How many levels are in Celeste Classic (PICO-8)?
In Chapter 3 (Celestial Resort), there is a hidden playable version of the original Celeste prototype on a PICO-8 computer.
The game is surprisingly lengthy. I expected it to end at 2500m (screen 25), but it just seems to keep getting harder.
How many levels are in Celeste Classic?
Solution 1:
According to a TAS video by Justin Jaffray, Celeste Classic goes up to 3000 m, plus the summit.
Completing Celeste Classic will unlock the Real Gamer achievement on PS4, Xbox One, or PC. (The Switch version does not have achievements).