You need to collect all 175 Strawberries over the game on the normal “CLIMB” mode.
After completing a level, you can see which Strawberry and in which section you have missed a Strawberry - which makes it a lot easier.
NOTE: This Guide contains all collectible related achievements:
*** Spoiler - click to reveal ***Strawberry Badge (10)
Collect 30 Strawberries
Strawberry Medal (25)
Collect 80 Strawberries
Impress Your Friends (50)
Collect 175 Strawberries
— — — — — — — — — — — — — — — — — — — — — — —
Gateaway (25)
Collect a Cassette (B-Side Tape)
... you need to have all of the Cassettes anyway to play all Chapters on B-Side and finally unlock C-Side
— — — — — — — — — — — — — — — — — — — — — — —
Pointless Machines (25)
Collect the Crystal Heart in Chapter 1
Resurrections (25)
Collect the Crystal Heart in Chapter 2
Scattered and Lost (25)
Collect the Crystal Heart in Chapter 3
Eye of the Storm (25)
Collect the Crystal Heart in Chapter 4
Quiet and Falling (25)
Collect the Crystal Heart in Chapter 5
Heavy and Frail (25)
Collect the Crystal Heart in Chapter 6
Pink Sunrise (25)
Collect the Crystal Heart in Chapter 7
Heart of the Mountain (30)
Collect the Crystal Heart in Chapter 8
I posted some video links in here containing all the collectibles such as
ALL Strawberries
ALL Crystal Hearts
ALL B-Side Tapes
Location: Celeste for PICO-8 <— in Chapter 3
Chapter 1 - Forsaken City - all Collectibles
Chapter 2 - Old Site - all Collectibles
Chapter 3 - Celestial Resort - all Collectibles
Chapter 4 - Golden Ridge - all Collectibles
Chapter 5 - Mirror Temple - all Collectibles
Chapter 6 - Reflection - all Collectibles
Chapter 7 - The Summit - all Collectibles
Chapter 8 - Core - all Collectibles
It took me awhile to write this guide so I really hope you appreaciate it and that I could help you out!
If there’s a mistake, please let me know.
Enjoy this brillant game!