Collectables
Berries
Red Strawberries
Red Strawberries, also known as Red Berries, are the main collectable of Celeste, and are found in every A-Side other than Reflection and Farewell. They serve no gameplay purpose other than as an optional challenge for the player, though they are required for some achievements and change the both the pie and the characters reactions to it at the end of Epilogue.
Strawberry Seeds
Strawberry Seeds are sometimes required to be collected for a Red Strawberry to spawn. They add a additional challenge, if you touch the ground at any time before collecting all the seeds the ones you have collected so far will disappear and you will need to start over. The total number of strawberries seeds you need to collect will differ depending on the specific berry
Winged Red Strawberries
Winged Red Strawberries, are a variant of Red Strawberries. Dashing in a room containing a winged Strawberry a will cause it to fly away off screen, phasing past any objects on its way. only returning once you leave the room or die. This forces the player to reach it without dashing. Sometimes a Winged Red Berry will be obscured by a wall requiring the player to dash so it can fly upward and be collected.
Golden Strawberries
Golden Strawberries are unlocked after beating Core B-Side, and appear at the start of every chapter the player has already beaten. Upon picking one up, the player is expected to finish the entire chapter without dying in order to collect it, as a death will result in both the loss of the berry and the player being teleported back to the room where they first obtained it.
Winged Golden Berry
The Winged Golden Berry is a collectable exclusive to Forsaken City A-Side, and can only be obtained by beating the level without dashing, as opposed to normal Golden Berries where the challenge is found in not dying. If the player does dash and then moves through a screen transition without dying, the winged berry will disappear and the player will have to restart the chapter to attempt it again. Upon completing Forsaken City A-Side without dashing, the player will find the Winged Golden floating in mid air, and can be obtained by dashing into it, though much like normal Winged Red Berries it will attempt to fly away.
Moon Berry
The Moon Berry is found at the very end of Farewell and to get to it the player has to break the final Breaker Box and then backtrack back through the final room, sans lightning. Doing so takes the player to a secret room, with the Moon Berry at the top. It collects identically to a normal berry, though it displays "WOW" instead of the a number, and unlocks the WOW achievement.
Crystal Hearts
Cassette Tapes
Main article: Cassette Tape
There is a hidden Cassette Tape in every chapter's A-side except Farewell. They can be found in special rooms that feature Cassette Block and a 8-bit remix of the music. Collecting a Cassette Tape will unlock that chapters B-side where you can find a red crystal heart.