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'''Techniques''', often simply known as '''tech''', are special moves [[Madeline]] can do to enhance her mountain-climbing ability. They come in a wide range of uses and difficulties. Many can be used to skip sections of a room or multiple rooms at once. There are a lot of techniques in ''Celeste'' and their variations, so it is virtually impossible to describe them all.
'''Tech''', sometimes called '''techniques''', are special moves [[Madeline]] can do to enhance her mountain-climbing ability. They come in a wide range of uses and difficulties. Many can be used to skip sections of a room or multiple rooms at once. There are a lot of tech in ''Celeste'' and their variations, so it is virtually impossible to describe them all.
 
All numerical values of speed given are in pixels per second.
'''Warning:''' Some higher-level and more obscure techniques (like 7-Jumps) may be missing, improperly named, or poorly described, so do not expect 100% accuracy or comprehensiveness. If you notice any issues, inaccuracies, or typos, please let us know by reporting them on the [[{{TALKPAGENAME}}|talk page]] or [[Special:EditPage/Techniques|fixing them yourself]] BEFORE criticizing the wiki on [[Celestecord]] or something. We appreciate your help in making Celeste Wiki more complete!
 
'''Note:''' Some higher-level and more obscure tech (like 7-Jumps) may be missing, improperly named, or poorly described, so do not expect 100% accuracy or comprehensiveness. If you notice any issues, inaccuracies, or typos, please let us know by reporting them on the [[{{TALKPAGENAME}}|talk page]] or [[Special:EditPage/Tech|fixing them yourself]]. This way, you get to improve Celeste Wiki for future readers, and we appreciate your help in making the wiki more complete!
== Dash Tech ==
Dash Techs require a dash to perform them.
 
Some other (possibly more extensive) sources of tech:
'''Extending''' a dash tech allows ample time (10 to 15 frames) touching the ground to restore the dash. '''Reversing''' a dash tech creates a launch trajectory opposite of the direction dashed to by pressing the opposite direction key between dashing and jumping.
* [https://docs.google.com/document/d/1RVXyO7AZB-r7X3FxkxrBob775qWdhfOyBEOGGbnTgws/edit#heading=h.yyzcmogdk15a Celeste TAS tech document]
* [[Strawberry Jam Collab]] gyms and library
* [https://icebergcharts.com/i/celeste_tech Celeste tech Iceberg] (no explanations of techs listed)
 
== Mechanics ==
Superdashes and Hyperdashes can be extended. All dash techs except for Demodashes and Wallbounces can be reversed. Trajectory height can be adjusted by holding down the Jump key for different durations.
 
[[File:Mid-air super.gif|thumb|240x240px|Reverse Superdash (Top), Superdash (Bottom)]]
These "techs" were added primarily to make the game feel smoother and more forgiving, but they can be taken advantage of.
 
=== Coyote Time/Jump ===
Madeline can input a jump for 5 so-called "coyote" frames after walking off a ledge, allowing for more distance in certain situations. Hyperdashes and superdashes can be done during coyote frames despite not being on the ground.
 
=== Directional Spikes ===
Spikes won't hurt Madeline if she collides with them as long as she's moving in the direction they point.
 
=== Fastbubbling ===
Dashing inside a stationary green or red bubble will make it move instantly in the direction of a dash, saving around a second if done immediately after entering a bubble.
 
=== Fastfalling (Fastfall) ===
Holding down mid-air will change Madeline's max fall speed to 240 pixels per second instead of the usual 160. This is notably required in {{ch|9|lf=1}} and is used to save time in "falling" areas.
 
=== Input Buffering ===
Attempting to perform an action that's not currently possible will "buffer" (store) the input for the next 5 frames. If it becomes possible within those 5 frames, Madeline will instantly perform it. For example, if you press jump slightly before landing on the ground, Madeline will jump on the first possible frame. This is notably used to execute tech instantly after a screen transition or to turn frame-perfect tricks into 5-frame windows. It can be done with almost every action in the game.
 
=== Screen Transition ===
When transitioning between two screens, Madeline's dash(es) and [[stamina]] are restored. This can be used to gain height or reach otherwise unreachable areas. This is required to get a [[crystal heart]] in {{ch|2A}}.
 
=== Liftboost ===
Liftboost, rather than a tech, is a basic game mechanic. When being moved by an entity like a [[Zippers|Traffic Block]], the amount it moves you is stored as a value called liftboost. When letting go of the moving entity, your speed gets set to your liftboost value. There is a maximum value for liftboost, which is -130 for vertical velocity and 250 in the moving direction for horizontal velocity. When jumping, liftboost is added to your jump speed, so the maximum vertical speed for a jump with liftboost is -235 and the maximum horizontal speed is 355.
 
Other actions, such as hypers, supers, and dashes, apply liftboost the same way a jump does. The speed calculation for a hyper is (260+liftboost)*1.25 horizontal and (-105+liftboost)*0.5 vertical, so liftboost is applied slightly differently to hypers than to other actions.
 
== Dash Tech ==
Dash Techs require a dash to perform, though, for many, a dash can be substituted with a bubble.[[File:Mid-air super.gif|thumb|240x240px|Reverse Superdash (Top), Superdash (Bottom)]]
 
=== Superdash (Super) ===
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{{Main|Superdashes}}
 
To perform a superdash, dash horizontally on the ground and jump before the dash ends. This will result in a longer and faster jump, granting 260 speed.
Supers are the most basic dash tech. Compared to Hyperdashes, they travel in a higher and shorter arc.
 
To perform a Superdash, dash parallel to the ground and press Jump before the dash ends.
 
Superdashes can be extended or reversed.
Line 25 ⟶ 53:
{{Main|Hyperdashes}}
 
To perform a hyperdash, dash diagonally downwards into the ground and jump before the dash ends. This will result in a burst of speed similar to a superdash, only granting 325 speed instead of 260, and half the height of a regular jump.
Hypers are a quick and easy way to move quickly on flat ground or traverse large gaps. Compared to Superdashes, they travel in a lower but farther-reaching arc.
 
To gain the higher speed of a hyperdash as well as the full jump height of a superdash, you can do a short hyperdash by only tapping jump and then doing another full-height jump afterwards. This is usually referred to as a hyper bunnyhop.
To perform a Hyperdash, dash diagonally down along the ground and press Jump before the dash ends. To perform a Hyper mid-air, see [[Demodashes|Demodashes]] below.
 
Hyperdashes can be extended or reversed.
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{{Main|Wavedashes}}
 
The wavedash is a variation of the hyperdash in which the down-diagonal dash is started midair rather than on the ground. Wavedashes are functionally identical to '''Hyperdashes'''hyperdashes in thatas they provide the same speed and height, however, Wavedasheswavedashes can be done on smaller surfaces. Wavedashing is taught in the Event Horizon subchapter in {{ch|9|lf=1}}.
 
Wavedashes can be extended or reversed.
 
=== Extended Dashes ===
To perform a Wavedash, dash diagonally down (↘) towards the ground and press Jump as you touch it. If you don't regain a dash, dash from higher up before jumping. If you don't travel far, dash from lower before jumping.
A dash lasts 15 frames. When performing a dash, there is a 10-frame cooldown before Madeline's dash is restored. When performing a super/hyper/wavedash, you can regain your dash by jumping at the right time; dashing after the 10-frame cooldown has passed, but before the dash has ended.
 
=== Reverse Dashes ===
Wavedashes can be reversed.
When performing a super/hyper/wavedash, the direction of your dash is not actually relevant. By jumping in the opposite direction of the dash, the tech can be performed in the opposite direction, for instance, a reverse wavedash by dashing down-left and jumping right.
 
=== Ultradash (Ultra) ===
[[File:Ultra.gif|thumb|240px|Ultra]]
{{Main|Ultradashes}}
 
An Ultradash'''ultradash''', commonly referred to as an Ultraultra, is a diagonal-down (↘) dash performed when Madeline is traveling with a high horizontal velocity. By doing it, she gains a 1.2x multiplier to her horizontal speed upon touching the ground. Unlike every other dash, an ultra doesn't reset Madeline's speed to 0 provided it ends mid-air. Thus, it allows going very fast on suitable terrain.
 
The simplest and most common way to perform an '''Ultra''' is to perform a hyperdash (though one can be performed any time Madeline is moving fast, like after dashing diagonally-down out of a red bubble or getting flinged by a [[bird]]) and dash down-diagonally as soon as possible. The dash must end before Madeline touches the ground to maintain the momentum (Dashing will reset your speed after ending, unless the dash is down-diagonal. Landing on the ground converts a down-diagonal dash into a horizontal dash, thus losing the speed), so players should start from high enough up that it will end before they land. It's important to jump right after you touch the ground to lose as little speed to friction as possible. Players should aim not to buffer the jump input because this is likely to prevent the 1.2x boost, and instead should tryjump to press jumpshortly after landing on the ground.
 
==== Chained Ultras ====
Multiple Ultras can be done in a row. This requires very specific terrain, but Madeline can quickly reach incredible speeds due to the multiplicative speed gain of Ultras.
 
==== Grounded Ultras ====
Grounded Ultras are the fastest way to move on flat terrain (390 speed optimally). Dashing down-diagonally while on or very close to the ground will still give the 1.2x speed boostmultiplier, but all of it will be lost when the dash ends.
 
To perform a Grounded Ultra, dodown-diagonally andash extendedinto '''Hyper'''the andground. As this is a down-diagonallydiagonal dash, asyou soonwill asreceive possiblethe (extended1.2x '''Super'''speed also worksmultiplier, but issince slower).down-diagonal Thisdashes resultsare inconverted ainto dashhorizontal withones 390on speed optimally andthe floor, correctionthe ifexcess dashingspeed inwill thebe firstremoved twowhen framesthe afterdash jumpingends. Because this is essentially the same input as a '''Hyper'''hyper (a down-diagonal dash into the ground), players can jump before the dash ends to perform a '''Hyper''' and be given 325 speed and '''Hyper''' height. This can be chained infinitely on flat terrain by dashing down diagonally right after jumping. It's more optimal to jump as late as possible, on the 14th frame optimally.
 
===== Cutscene Ultras =====
Skipping a cutscene cancels the dash state of Madeline. This can be used to conserve the speed of a '''Grounded Ultra''' that would normally end at the end of the dash. Although cutscenes rapidly decrease Madeline's speed, skipping on the first frames available allows Madeline to keep most of the '''Grounded Ultra''' speed (390).
 
===== Grounded Ultra Cancel =====
When dashing at high speeds, excess speed is only removed once the dash ends. By interrupting the dash before it ends, the speed from the grounded ultra can be retained. This can be done in many different ways: grabbing a throwable, skipping a cutscene, bouncing on a snowball, so long as it interrupts the dash.
Using the same principle as Cutscene Ultras, canceling your dash while in a '''Grounded Ultra''' makes Madeline keep all 390 speed from it. This can be done in other ways than skipping cutscenes. An example is canceling your '''Grounded Ultra''' with doors (both key doors and mirror temple doors work), done by colliding with a door with a '''Grounded Ultra''' within the last 4 frames before it opens and not being in the dash state when the door opens (You can do a '''Hyper''' after colliding with the door to stop being in dash state and still get the stored speed value of the grounded ultra once the door opens).
 
==== Chained Ultras ====
Multiple '''Ultras''' can be done in a row. This requires very specific terrain, but Madeline can quickly reach incredible speeds due to the multiplicative speed gain of '''Ultras'''.
 
==== Delayed Ultra ====
When colliding with the ground, if your last dash direction was down-diagonal, you will get an ultra, granting a 1.2x speed multiplier and crouching you. This can be abused by dashing diagonally without landing on the ground, stalling in the air before landing somewhere different, and gaining the 1.2x speed multiplier at a later point somewhere different.
Canceling a down-diagonal dash before it hits the ground will not remove the flag that tells the game to give Madeline a 1.2x speed boost when she next touches the ground. This is usually done using a cornerboost or by grabbing a [[throwable]] object. Any other method of canceling a dash (such as bopping a snowball) will still provide a delayed ultra, but will likely slow Madeline down enough that the 1.2x speed boost is negligible.
 
An iconic example of an {{Tooltip|RTA|humanly-possible}} '''Delayed Ultra''' is used in the Awake checkpoint of {{ch|2A}}, where runners build up massive amounts of speed utilizing a '''Delayed Ultra''', multiple cornerboosts, and multiple chained '''Ultras'''.
 
=== Demodash (Demo) ===
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{{Main|Demodash}}
 
'''Demodashes,''' (shortened to demos), also known as '''crouch dashes''' in-game, is a techniquetech that allows the player to dash with the crouched hurtbox (4 pixels instead of 9), allowing you to slip through [[spinners]], [[dust bunnies]], and other obstacles unharmed, provided the gap between them is at least 4 pixels.
 
When a demodash ends, Madeline will uncrouch, returning her hitbox to full height. This is often used to make cornerkicks more lenient by demodashing up-diagonally into the corner, causing Madeline to uncrouch as soon as she passes the corner and touches the wall.
You can bind a '''Demo''' button in-game since the [[Version history|1.4.0.0 version]] of the game. You can manually do '''Demos''' by pressing the Down key ''before'' (within 4 frames or 0.068 seconds) — but not during — a dash. There are no advantages to doing them manually, but it can be the only way to perform them on a console with a version older than 1.4.0.0.
 
You can bind a Demo button in-game since the [[Version history|1.4.0.0 version]] of the game. You can do a demodash manually by dashing down and then holding a different direction ''before'' (within 4 frames or 0.068 seconds) — but not during — a dash. There are no advantages to doing them manually.
 
==== Demohyper ====
JumpingDashing duringdown-diagonally is not necessary to do a '''Demo'''hyperdash: willso resultlong inas Madeline is crouching, a '''Hyper'''hyper becausewill be performed instead of thea crouchedsuper. stateThis neededmeans fordoing thea '''Demo'''horizontal indemodash thewill firstresult place,in allowinga youhyper torather startthan a Hyper mid-airsuper. '''Demohypers''' have a higher dash speed than regular hypers (240 instead of 169) than regular '''Hypers''' since they're horizontal andrather notthan diagonal dashes, althoughthough this can makebe themdisadvantageous harderin orplaces evenwhere impossible to extend inspace someis caseslimited.
 
==== Up Diagonal Demo (Diag Demo) ====
It is also possible to '''Up-Diagonal Demodash''' with the demo button. It reduces Madeline's hitbox and hurtbox and allows for an easier cornerkick. This can be done by doing the diag-demo onto the ceiling that precedes the corner. After the end of the dash, Madeline's hitbox will return to normal and make the cornerkick possible if Madeline is close enough to the corner. It also has a few other uses.
 
==== Up Demo ====
You can also perform a demo updash which can be used to perform demo wallbounces which give a slightly higher height if buffered against a corner.
 
=== Wallbounce (wounce, wb) ===
[[File:Wallbouncing.gif|thumb|240x240px|Wallbounce]]
{{Main|Wallbounces}}
 
'''Wallbounces''' are a techniquetech mainly used to gain height. TheyTo aredo functionallya identicalwallbounce, dash up and jump during the dash duration while next to '''Supers''',a butwall. areIt performedis byto be noted that wallbounces doinghave a dashslightly upwards.lower Unlikevertical '''Supers''',speed theythan willan notupdash. restoreThus, yourjumping dashas sincelate youas aren'tpossible touchingis themore groundoptimal for gaining height.
 
Wallbounces can be performed out of red or green bubbles.
To do a '''Wallbounce''', dash up and walljump during the dash duration. It is to be noted that '''Wallbounces''' vertical speed is slightly lower than the updash's. Thus, wallbouncing as late as possible is more optimal for gaining height.
 
==== Bubble Wallbounce ====
'''Wallbounces''' can be performed directly out of a green or a red bubble.
 
==== Dash Block Boosted Wall Bounce ====
Doing a wall bounce on a vertically moving [[kevin]], [[zipper]], or a dash block gives Maddy a lot more height than a normal wall bounce and also regains Madeline's dash.
 
==== Dream Wallbounce ====
Wallbounces can be inputted in the few frames after leaving a dream block, similar to supers and hypers. Requires gaining an extra dash while inside the dream block.
 
==== Lava climbing/Wallbounce ====
Lava blocks have a hitbox inside them that's 2 pixels away from their hurtbox. Because Madeline can walljump whenever she is within 3 pixels of a wall, there is a single pixel where you can wallkick it or climb it with climbjumps or neutral jumps. Additionally, you can even wallbounce off of lava, since Madeline can wallbounce as long as she's within 5 pixels of a wall instead of the usual 3 pixels. The frame window for the wallkicks input can be extended by buffering the jump, but it isn't guaranteed to get a wallkick unless you're moving below 80 speed.
 
==== Transition Wallbounce ====
Since the game keeps your dash state through transitions, it is possible to updash into a transition and '''Wallbounce''' in the next room while still in the dash state. Because the game restores your dash(es) between screen transitions, you'll still have your dash after doing such '''Wallbounce'''. Transition tech is also known as '''kermit tech'''.
 
== Dashless Tech ==
Dashless Tech refers to techniquestech that don't need a dash to perform. They tend to be more complex or precise.
 
=== Liftboost ===
A Liftboost is a very low-level tech, rarely seen as a tech in the traditional sense. When being moved by an entity like a [[Zippers|Traffic Block]] you get a certain Velocity. When letting go of the moving object, your speed gets set to your velocity, unless your velocity exceeds the Liftboost cap, which is -130 for vertical velocity and 250 in the moving direction for horizontal velocity. When jumping, your velocity first gets capped and then the jump velocity gets added to your speed, so the maximum speed for vertical Liftboosts is -235 and 355 for horizontal speed.
 
=== Bunnyhop (Bhop) ===
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{{Main|Bunnyhops}}
 
A '''bunnyhop''' is loosely defined as jumping the moment Madeline hits the ground. Because there is more friction on the ground than in the air, bunnyhops allow Madeline to conserve speed over longer distances. Bunnyhops are often used after a wavedash or a hyperdash to get the height of a full jump and keep the speed received.
 
Bunnyhops are often used after a '''Wavedash''' or a '''Hyper''' to get a greater height and keep the speed received.
 
Because each jump gives Madeline a short burst of speed (+40 speed), repeating bunnyhops is the fastest method of dashless movement along flat ground. It is common among speedrunners to bunnyhop in {{ch|Pr|lf=1}}, as it is not possible to dash there.
==== Chained Bunnyhop ====
Because each jump gives Madeline a short burst of speed (+40 speed), repeating bunnyhops is the fastest method of dashless movement along flat ground. They are frequently used by speedrunners in {{ch|Pr|lf=1}}, as it is not possible to dash there.
 
=== Neutral Jump (Neutral) ===
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{{Main|Neutrals}}
 
Neutrals are one of the most fundamental pieces of dashless techsmovement and vertical mobility in general. They allow Madeline to scale flat and uneven walls alike without using any [[stamina]], even with downward [[wind]].
 
To do a Neutral, jump off the wall ''without'' holding directional keys, then immediately move towards the wall again. Rinse and repeat to keep moving up. The jumps can be delayed to stay in place.
 
=== Cornerkick ===
Cornerkicks are wallkicks ofoff corners. Performed when Madeline passes right under them, they give a little bit of height.
 
To cornerkick, jump towards the corner, and press Jump again when you're right next to the corner.
 
Cornerkicks will be neutral if no directional keys are held beforeon doingthe itframe you press jump.
 
=== Crouch Jump / Crouch Climb ===
Madeline can jump while being crouchedcrouching and will keep being crouchedcrouching as long as she's goinggoes upward. This can be used to reduce her hurtboxhitbox to avoid getting hit. Madeline can also climbjump while keeping crouch state, but she can not grab walls without moving downward and hence uncrouching. Wallkicks will also uncrouch you.
 
Note that it is possible to be crouched while holding a wall if the player lands a delayed ultra by sliding to the bottom of a wall while still grabbing it. They can then wallclimb upward while keeping their crouched hitbox until they next move downward.
Madeline can also climbjump while crouched, but she can not grab walls and hence wallclimb.
 
=== Wallboost ===
Pressing away from a wall 11 frames or less after neutral climbjumping will refund the stamina cost from the climbjump as the jump is converted into a wallkick 'after the fact.' HoweverAfter performing a wallboost, unlike a normal wallkick, you can still press toward the wall again to quickly return to it. This allows stamina-less climbing but is only faster than neutral jumps when performed optimally by a TAS. It has other uses, mainly in beating stamina puzzles. Performing a wallboost will cause falling blocks to instantly drop instantly, since you stopped grabbing the wall, but it's possible to regrab them significantly faster than you could with a neutral jump or a wallkick.
 
If you do a wallboost while grabbing a wall and also touching the floor, the stamina from a climbjump will still be 'refunded' despite not being consumed in the first place. This means you will have 138137.5 stamina, whereas Madeline's maximum stamina is supposed to be 110, allowing you to do five climbjumps before running out instead of four.
 
=== 5 Jump ===
When Madeline grabs the top of a wall, she will slide down a significant amount and not be able to climb up further. However, you still can climbjump or wallkick off the top of the wall. A 5 jump is executed by using a neutral climbjump to reach the top of the wall and then jumping or climbjumping off it. This techniquetech allows you to cross a 5-tile gap, hence its name.
 
=== Cornerboost (cb) ===
When Madeline collides with a wall (when her speed attempts to move her inside the wall and is blocked by the tile), the game stores her current speed as "retained" speed. If the wall no longer blocks Madeline from moving forward within the next 5 frames, the retained speed will be refunded (so Madeline will keep moving at the speed she had when she hit the wall).
When climbjumping on the top of a corner with horizontal momentum, it is possible to conserve all of her previous momentum while also gaining +40 speed if the climbjump is done before touching the wall. This is called a '''cornerboost'''. They also cancel dashes, so their speed is preserved instead of lost at the end of the dash. If going above 180 speed, it isn't assured that you can climbjump before touching the wall, even if you're buffering it.
 
The most common way to intentionally use retained speed is to do a '''cornerboost'''. Doing a climbjump at the top of a wall with momentum will push Madeline over the top and refund the retained speed. Since climbjumps cancel dashes, this is a way to preserve the speed of a dash if it would otherwise have been lost when the dash ended.
[[File:Cornerboost grid.png|thumb|Pixel positions for a good or bad cornerboost on a normal horizontal dash, which gives Madeline 240 speed (4px per frame).]]
Climbjumps, like ground jumps, give Madeline +40 speed in the direction the player is holding. If the climbjump is done ''before'' Madeline collides with the wall, that extra +40 speed will be included in the retained speed value. This is known as a ''''good cb'''', where climbjumping ''after'' colliding with the wall is called a '''bad cb.''' Above 180 speed, it is possible that there will not be a frame where Madeline can climbjump before she collides with the wall, and as such, a bad cb will be inevitable even when jump is buffered. There are 3 pixels Madeline can occupy and climbjump on before she actually collides with the wall, so if moving at 4px/frame like in a typical horizontal dash, 1 in every 4 pixels will give a bad cornerboost.
 
==== Downward Cornerboosts ====
Grabbing a wall immediately removes all of Madeline's speed. Note that grabbing is not the same as climbjumping. In order to grab a wall, Madeline needs to:
Doing a cornerboost while Madeline has downward momentum works differently than when she has upward or horizontal momentum: Madeline loses all her speed and does a regular climbjump unless there are 2 pixels separating Madeline from the wall, making those cornerboosts horizontally pixel perfect.
 
* Be on one of the two pixels closest to the wall
* Not be moving downward
* Not be in dash state
* Not have less than 20 stamina (sprite flashing red)
 
As you do not want to grab and lose all your speed for a cornerboost, another of these conditions must be met if Madeline is moving downward and the player wants to cornerboost. The simplest method is to do a down diagonal dash as in a delayed ultra. However, if the cornerboost needs to be done without dashing, Madeline needs to be 3 pixels away from the wall - too far to grab but close enough to do a climbjump. She will now be moving upward on the next frame and unable to jump for that reason. Note the similarity to climbjumping on a moveblock without activating it, which is also about avoiding grabbing the block.
 
==== 6 Jump ====
A '6 jump' is a dashless cornerboost that travels over 6 tiles, typically over spikes. This is done by being at full air-strafe speed (90) and doing a cornerboost on the top of a wall to gain another +40 speed. It must be done in the first room of Crossing for the [[Winged Golden Strawberry]] in dashless [[Forsaken City|City]].
6 Jumps utilize cornerboosts as a dashless tech, whereas a 5 Jump is done while already having horizontal momentum. To do a 6 Jump, get some horizontal motion to the wall corner and climbjump on it as if you were doing the second half of a 5 Jump. A cornerboost will be done instead, spanning 6 tiles.
 
==== Double Cornerboost ====
If Madeline has a horizontal speed below ~144, it's possible with precise pixel positioning to cornerboostclimbjump once and not hityet collide with the wall, making it possible to execute anothera cornerboostsecond climbjump before colliding and gain an additional +40 speed. This is typically a frame-perfect input, as you need to jump twice on consecutive frames.
 
==== Reverse Cornerboost (rcb) ====
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==== Neutral Reverse Cornerboost ====
A neutral reverse cornerboost allows you to not lose any speed compared to a regular reverse cornerboost. YouTo mustexecute holdthis neutralyou directionsmust whileface performingtowards the reverse cornerboost, done by pressing the opposite directionwall and then goingrelease neutralall directions before making the cornerboost, making Madeline face the cornerjumping. Since this is a neutral cornerboostclimbjump, pressing the opposite direction Madeline is facing within the next 11 frames will cause a wallboost- setting your horizontal speed to ~125 no matter the previous speed. BecauseFor ofthis thatreason, neutral RCBs are generally undesirable at high speed as air friction is doubled when you can'tare holdnot aholding directionalthe direction that Madeline is keymoving, makingand youthe lose11f yourof extra friction outweighs the -40 speed twicefrom asthe reversed climbjump. However, this is sometimes used intentionally at low speeds to gain speed from the wallboost (e.g. Pillarless in 5B) or to wallboost after a screen transition and gain some extra horizontal speed (e.g. the fastest entry to City start room fast6).
 
==== Spiked Cornerboost ====
A '''Spiked Cornerboost''' is a cornerboost on a corner that has spikes on one or two adjacent surfaces. A notable example of a spiked cornerboost is the "Dreadcorner" strat in {{ch|5B}}, which skips the same rooms that a Bubsdrop does.
 
==== Disappearing BlocksBlock Cornerboost ====
A block disappearing (such as a door or a cassette block) works just the same as going over the top of a wall for the purpose of refunding retained speed.
It is possible to cornerboost off the wall of a disappearing block (such as cassette blocks and doors) and gain 40 speed from it. Simply climbjump into the block right before it disappears.
 
=== Spike Jumps ===
{{Ambox|type=content|text=This section lacks information about spikejumps off moving blocks. Please take a moment to improve this section.}}
A lot of techniques are called spikejumps, mostly referring to interactions with the mechanic of directional spikes allowing Madeline to get through them without dying as long as she goes in the same direction. This lets her cornerkick off of walls with spikes. This is used in {{ch|5B}} to skip a portion of the chapter.
 
Spikejumps can refer to one of two situations: either Madeline is being pushed into spikes (via wind), or spikes are being pushed into Madeline (when attached to moving blocks).
You can also jump off spikes on the ground even if there's [[Wind|downwind]] since the game checks your hurtbox ''before'' the wind pushes you down. Thanks to that, if the wind made you enter the spikes, you can buffer a jump there. However, it is required to be at a precise y-position above the spikes to get pushed into them.
 
Wind applies a constant movement to Madeline every frame, however, this movement is applied independently of her regular speed calculations and after collision checks occur. As a consequence, it is possible to jump off surfaces beneath spikes before collision checks are applied.
 
== Entity Tech ==
Entity Tech refers to using various [[Mechanics|blocks or [[entities]] to do useful techs.
 
=== Bumper / Fish / Seeker Explosion Boost ===
GettingExplosions nearcaused [[Pufferfish]]esby pufferfishes, touching [[Bumper]]sbumpers, and being near [[Seeker]]s whenor theyreviving reviveseekers grantsgrant Madeline some momentum. If you're holding the same direction Madeline is boosted towards, you gain about 50 extra horizontal speed.
 
=== Fish / Ice / Oshiro / Seeker / Snowball Jump ===
Holding jump when landingbouncing onoff the top of something ([[Oshiro]], a [[snowball]]snowballs, a [[pufferfish]], a [[seeker]]s, or an ice ballballs (in {{ch|8|lf=1}}vanilla) will give Madelinegrants a significant amount of height compared to not pressing jump, and alsoif preservedashed someinto ofwill Madeline'salso preserve any horizontal momentum. Madeline'sas dashes andthe staminabounce will becancel restoredthe regardlessdash. For this reason, dashing horizontally onto one of whetherthese theentities jumpand jumping is heldsometimes referred to as a "fish super", "snowball super", and so on, despite mechanically not being related to a superdash.
 
Hitting the top of one of these entities will also cancel Madeline's dash, preserving some of the momentum. For this reason, dashing horizontally onto one of these entities and jumping is sometimes referred to as a "Fish super", "Snowball super", and so on, despite mechanically not being related to a Superdash.
 
=== Bubble Super / Hyper ===
YouIf the game considers you grounded while in a bubble, you can '''Hyper'''hyperdash or '''Super'''superdash out of bubbles if the bubble. isOnce atyou leave the ground, levelfor or5 ifframes, you're are in "coyote frames.time" Inwhen the firstgame case,still simplyconsiders performyou itto inbe on the bubbleground. YouBy can also fastbubble usingentering a regular dash or a '''Demo'''bubble and then jump to getinputting a '''Super'''hyper or a '''Hyper'''.super Ifwithin usingthis coyote5-frame frameswindow, dashyou intowill gain the bubblespeed toboost bufferas fastbubblingwell andas akeep jumpyour beforedash enteringfrom it. Thethe bubble, willeven then launch you withif the momentumbubble of ais '''Super'''mid-air.
 
This tech is used mainly in custom maps.
 
==== Archie ====
 
=== Archie ===
Tutorial: <u>[https://www.youtube.com/watch?v=7CxzOgWYB00 Flesh117]</u>
 
An "'''Archie"''' is entering a bubble with a crouched hitbox (from any direction), raising it by two pixels. This is usually performed with a '''demodash''', but can also be done simply using a '''duckcrouch jump'''. Archies are possible because bubbles center your hitbox when entered, hence you will be higher up if you enter the bubble with a smaller crouching hitbox.
 
=== Cloud Jump / Spiked Cloud Jump ===
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==== Cloud Super/Hyper ====
Just like on the ground, Madeline can do a '''Super''' or a '''Hyper''' off clouds and still get the vertical speed bonus, although it is somewhat more precise. Input a '''Super''' or a '''Hyper''' as the cloud bounces upwards. The higher you jump, the more height you'll gain.
 
==== Cloud Hyper Bunnyhop ====
On top of doing '''Supers''' and '''Hypers''' on clouds, you also can do a '''Hyper Bunnyhop''' on white clouds, but since it's extremely tight, most '''Cloud Hyper Bunnyhops''' are done with a reverse '''Demohyper''' (doing a Demohyper instead of a regular Hyper makes it easier since the vertical dash of the Demohyper is faster and thus goes further than a down-diagonal dash).
 
To execute it, do a very short Reverse Demohyper with a tiny jump as soon as you land on the edge of the cloud, then Bunnyhop when the cloud reaches its highest position to get maximum height.
 
=== Core BoostHyper/Super ===
Core blocks give coyote frames before disappearing at the end of their launch, and a hyper/super can be performed during coyote time. The speed from this is combined with the large amount of horizontal liftboost granted by the core block, causing core hypers to give high amounts of speed.
By jumping off a lava block a few frames before it breaks, you can gain a vertical speed multiplier of 2.25x and a horizontal speed boost depending on the block's launching direction: the more horizontally it launches you, the more speed you get. This tech is required to complete a few rooms in {{ch|8|lf=1}}.
 
==== Core Hyper/Super ====
By the same logic as '''Dream Hyper''', you can get lots of horizontal speed and height by inputting one of these techs at the last few frames (coyote frames) of the lava block's launch. This works the same way as a '''Core Boost''' and as such, the core block's launching direction affects how much horizontal speed you get.
 
Since you input the '''Core Hyper''' during coyote frames, you can even do it by grabbing the block: since this always launches the core block horizontally, you'll always get a massive speed boost.
 
=== Dream Jump ===
{{Main|Dream tech}}
 
You can jump out of [[dream blocks]] since they give coyote frames. The jump grants height andalong horizontalwith speedthe gain (+40 horizontal speed) and doesn'tgranted consumeby yourground dashjumps. To execute it, simply press jump as you leave the dream block. This techniquetech is taught by the [[bird]] in the {{ch|2B|lf=1}}.
 
==== Dream Double-Jump ====
You can double jump out of dream blocks by buffering a first jump in the dream block and jumping a second time in coyote frames after exiting it. Although this doesn't grant additional height compared to a regular dream jump, it does give an additional horizontal speed gain of 40, making it almost as fast as a '''Hyper'''hyper (320 speed compared to 325).
 
==== Dream Hyper ====
Instead of simply jumping out of dream blocks, a '''Hyper'''hyper or a '''Demohyper'''demohyper (which has a slightly bigger window) can be done in the few frames right after you leave the dream block due to coyote frames. This givesgrants much more325 horizontal speed thanand ahalved regularjump dreamjumpheight, butidentical lessto heighta regular hyperdash. Unlike dream jumps, thisdream hypers doesdo '''not''' give your dash back, as it is used after exiting the dream block.
 
You also can do a '''Super'''superdash out of a dream block, butthough itthis doesn'thas have as muchless practical use asthan adream '''Dream Hyper'''hypers or a '''Dreamdream Doubledouble-Jump'''jump.
 
=== Featherboost ===
Holding a diagonal direction with the movement buttons on the first frame of [[feather]] movement will give you an initial speed boost.
 
=== Feather Super ===
If you move horizontally along the ground in a feather and perform a jump, you will exit the feather state and perform a long jump. Despite the name, feather supers bear no mechanical relation to superdashes.
 
=== Seeker Bounce ===
After hitting a wall, [[seekers]] enter a different state for a brief moment. While inIn this state, you can bounce into them and get a horizontal speed boost (approximately '''Hyper''' speed). On top of refreshing your dash, it also affects your vertical speed depending on the angle at which you bump them. You cannot bounce off the top of the seeker since that's where the hitbox for "killing" them is.
 
=== Theo/Jelly Regrabs ===
[[File:Jelly Regrab.gif|thumb|A Jelly Regrab|240px]]
Grabbing a [[Theo Crystal]] or a [[Jellyfish]] while in a dash state cancels it, which makes you maintain your vertical and horizontal speed. You can do a regrab even if you're already holding a throwable object: to do so, throw it and quickly dash and grab into it. This can be useful if a small amount of height or distance is needed. Theo Regrabs are more challenging than Jelly Regrabs.
Grabbing a [[Theo Crystal]] or a [[Jellyfish]] in a dash state cancels it, which makes you maintain your vertical and horizontal speed. You can do a regrab even if you're already holding a throwable: to do so, throw it and quickly dash and grab into it. This can be useful if a small amount of height or distance is needed. Theo Regrabs are more challenging than Jelly Regrabs.
 
==== Jelly Laddering ====
Using two [[jellyfish]], Madeline can grab one after the other to keep some of her vertical or horizontal speed.
 
You can use this techniquetech to move upwards indefinitely by dropping and regrabbing the jellyfish, though it doesn'thas have manyfew practical uses and is quite inconsistent.
 
==== Theo/Jelly Ultras ====
You can also use the regrab mechanic to cancel a '''Groundedgrounded Ultra'''ultra, andcancelling keepa thedash massivewithout momentumlosing fromany speed at the itend.
 
=== Throwable Backboost (Backboost) ===
Throwing a jellyfish or Theo crystal grants Madeline 80 speed in the opposite direction it is thrown. This can be exploited by turning around briefly and throwing the throwable backwards, granting the speed bonus in the forwards direction.
Throwing an object opposite the direction Madeline is moving gives her a little speed boost.
 
=== Jellyvator / Theovator ===
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{{Main|Vators}}
 
Vators rely on the fact that holding down while releasing Grab will simply drop the throwable Madeline is holding (neutral drop) rather than throwing it. After dropping an item, dash upwards into it and grab it again. The dash will be canceled and its momentum preserved, giving Madeline some more height.
 
<u>'''Note:'''</u> Throwables appear to give more height the later they are grabbed. This is not due to a difference in the amount of momentum preserved from canceling the dash but simply due to Madeline being higher up when it is actually canceled. [[Theo crystal]]s provide less height than Jellyfishjellyfish since holding a Jellyfishjellyfish lowers Madeline's gravity.
 
=== Waterboost ===
When you are on the surface of water, it is possible to jump multiple times, with each jump giving 40 horizontal speed. Humans can generally only do two or three jumps, while the TAS can bounce on every possible frame, achieving incredible speed.
 
=== MechanicsReform Tech ===
Reform Tech is tech done with blocks that will disappear and respawn at their initial position, like [[cassette blocks]] and moving blocks, while they are reforming.
''Not to be confused with [[Mechanics]] (game objects)''
 
The block will not become solid if Madeline is in it and will instead start reforming once she leaves the block. The block becomes solid before spikes and other entities on the block are generated (except on cassette blocks, which reform instantly), enabling Madeline to grab onto normally spiked walls of the reforming block, or land on the reforming block even if its floor is spiked.
These "techs" were added primarily to make the game feel smoother and more forgiving to play, but can be taken advantage of.
 
==== CoyoteReform Time/JumpKick ====
Reform kicks are performed by being inside of a non-solid reforming block's hitbox, then moving horizontally out of the block after it is supposed to start reforming. If you input a jump while exiting the block, you will wallkick off its side. This is possible regardless of whether this side is spiked or not.
Madeline can perform actions doable only on the ground for an additional 5 frames after leaving it. This includes jumping, Supers, Hypers, and so on.
 
==== Reform Boost (Cassette Boost) ====
=== Directional Spikes ===
If you are near the top of a cassette block when it reforms, your position will be snapped upwards, placing you on top of it. By jumping as this happens, the sudden vertical movement is added, granting a considerably higher jump. The jump input cannot be buffered.
[[Spikes]] won't hurt Madeline if she collides with them as long as she's moving in the direction they point. This is the mechanic behind Spikejumps and one-way gates.
 
===== FastbubblingCassoosted Fuper =====
A Cassoosted Fuper is getting a cassette boost as you perform a feather super. This is a joke tech, primarily mocking the Celeste communities' culture of making portmanteaus out of tech names.
Pressing the Dash key inside a stationary green or red bubble will make it move instantly in the direction of a dash, saving around a second if done immediately after entering a bubble.
 
=== Fastfalling (Fastfall) ===
Holding down mid-air will change Madeline's max fall speed to 240 instead of the usual 160. This is notably required in {{ch|9|lf=1}} and is used to save time in "falling" areas.
 
=== Input Buffering ===
Attempting to perform an action not currently possible will "buffer" (store) the input for the next 5 frames. If it becomes possible within those 5 frames, Madeline will instantly perform it. For example, if you press jump slightly before landing on the ground, Madeline will jump on the first possible frame. This is notably used to execute techniques instantly after a screen transition or to turn frame-perfect tricks into 5-frame windows. It can be done with almost every action in the game (Buffering Ultras might not grant the x1.2 speed boost because you can jump off the ground without landing on it, depending on your y-pixel).
 
=== Screen Transition ===
When transitioning between two screens, Madeline's dash(es) and [[stamina]] are restored. This can be used to gain height or reach otherwise unreachable areas. It is required to get a [[crystal heart]] in {{ch|2A}} and some Red Strawberries. A lot of techniques can be used to abuse this mechanic, sometimes known as '''kermit tech'''.
 
== Other Tech ==
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=== Binoculars Clip (Bino Clip) ===
To reduce strain on the game, when usingthe player uses {{Tooltip|binos|entities to preview the binocularsscreen}}, the game will unload spinners not currently visible, allowing Madeline to dash or even walk through them with total safetysafely until they load back in. To do this, look in the binocularsbinos, move them away enough to unload the spinners, and then quickly leave and dash through them.
 
=== Bubsdrop ===
Line 311 ⟶ 317:
 
=== Pause Buffering ===
When unpausing the game, there is a short window (~10 frames) in which the game has not started yet. Inputting anything induring this period up to 6 frames (notably longer than the standard 5-frame buffer window) before the game starts will make the input processedoccur inon the first frame of the game running. This allows you to input a movement command as well as another pause command, effectively making the game run one frame at a time, making frame-perfect techs (like [[Demodashes]]) significantly easier to perform.
 
=== SplippedSpinner droostsStunning ===
Information: [https://youtu.be/ptFniiXj2f4?t=396 Msushi (YouTube)]
It is possible to dreamdash in the top corners of a spiked dream block without actually entering it. The name is considered a meme.
 
Spinners only gain collision when within a certain distance of Madeline, and they check whether they are in this distance every third frame. By pausing on the frame this check occurs, the check is skipped, keeping the spinner uncollidable. This can be chained to keep spinners nonlethal for arbitrarily long time periods. Critically, this check has a pseudo-random offset on each spinner, effectively separating all spinners into three groups, only one of which may be stunned. While humans have performed spinner stunning, it is generally considered a TAS-only tech as each pause is frame-perfect, and without using hitboxes it is impossible to tell which group is being stunned. Lightning can also be stunned in the same manner as described above.
=== Undemo dashing ===
Also known as omed dashing, it's the reverse of a demodash. It is useful in very specific circumstances, like entering a dream block uncrouched. A good example of this is the [https://gamebanana.com/mods/470120 Weightless Pressure] mod.
 
(Note that spinners are made uncollidable rather than unloaded - they are still loaded as usual, just unable to kill Madeline.)
=== Cassoosted Fuper ===
 
This is essentially a joke tech. The full name of this tech is Cassette Boosted Feather Super. When [[cassette blocks]] activate, you have around a frame that you can jump and get a large vertical boost. This is known as a cassette boost. A feather super is going horizontally along the ground in a [[feather]] and jumping right when it runs out to get a horizontal speed boost. So a Cassoosted Fuper is getting a cassette boost as you perform a feather super.
==== Spinner Freeze ====
After waiting for around 118 hours in a level, the TimeActive variable will stop increasing due to floating point imprecision. TimeActive is the variable that decides which spinner group to check, so two-thirds of spinners will never be loaded, making a variation of spinner stunning humanly possible.
 
=== Undemo dashing ===
This tech is the opposite of a manual demodash. Instead of forcing the frame 1 crouch check to be made on a non-downward dash, the player avoids the crouch check on a downward dash by redirecting from a neutral or non-downward direction. It is useful in particular circumstances, like entering a dream block uncrouched or collecting a heart from the bottom with a down dash. A good example of this is the [https://gamebanana.com/mods/470120 Weightless Pressure] mod
 
=== Half Stamina Climbing ===
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Madeline can also neutral jump within 2 frames of a wallboost. This does not consume stamina and allows Madeline to climb faster than using only neutral jumps.
 
[https://youtu.be/FHAuZJC6HaA?t=1620 The 100% TAS uses this techniquetech when obtaining the heart in 6A.]
 
=== Kermit Dash ===
Kermit Dashing is more like a joke tech, very rarely used. Dashing through a screen transition doesn't actually cancelcancels your dash., Itbut letsdoes younot controlremove Madelinethe freely,'dashattack' withouttimer stoppingwhich yourallows Madeline to do 'dash attackactions' like [[Wallbounces|wallbounce]], breaking blocks, and maintainsentering the[[Dream originalBlocks|dream blocks]]. The 'dash direction' of a cancelled dash is also maintained. For example, this lets you activate a [[Kevin]] from angles not usually possible or for preserving your dash. This is used in the "True ending" from Ivory in [[Strawberry Jam Collab]].<!-- no consensus == Modded Tech ==
Modded Tech can't be done in the base game due to the level design but can be found in modded levels. The tech still exists in vanilla, there just isn't a spot to perform it.
=== Dream Redirect ===
Dream blocks only restore your dash upon exiting, so you have 0 dashes inside. If a [[dash refill]] or a double dash crystal is placed inside dream blocks, you can recharge your dash — and even use it — while inside the dream block. Doubledash crystals also act the same.
 
=== Spiked Sideways Jumpthroughs ===
You can jump on a sideways jumpthrough.
-->
<!-- == TAS-Only Tech ==
These are techs only possible in [[TAS|Tool-Assisted Speedruns]] due to their complexity. Some of them can be performed by humans under the right circumstances. -->
 
== Trivia ==
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* The [[bird]] will teach the player multiple techs throughout the game: climbing and dashing in {{ch|Pr|lf=1}}, Dream Jumps in {{ch|2B|lf=1}}, Wallbounces in {{ch|7B|lf=1}}, and Hyperdashes in {{ch|8C|lf=1}}.
* The game will teach [[Wavedashes]] to the player in {{ch|9|lf=1}} right after passing the [[Crystal Heart Gate]] in Event Horizon. The bird is also mentioned in that tutorial.
* The Demodash wasis discoverednamed byafter the player DemoJameson, who discovered the tech on October 14, 2018, and was subsequently named after him.
 
[[Category:TechniquesTech| ]]
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