Celeste players have more or less agreed on a difficulty ranking system. There are following named difficulties: Beginner < Intermediate < Advanced < Expert < Grandmaster < GM+1 < GM+2 < GM+3 All of those are further split into three sub-difficulties each: green, yellow and red. The base game any% (climbing the Celeste mountain) peaks at red beginner. The base game 100% (everything except goldens) peaks at red intermediate/green advanced. The infamous D-Sides pack (1D-8D, gamebanana.com/mods/150759) peaks at red expert. Strawberry Jam Collab (gamebanana.com/mods/424541) peaks at green GM+1. GM+3 is generally considered TAS-only. The rankings for the maps are as follows: 7. Old Site - green beginner 1. Paint section of the Blueberry Bay - red beginner 11. Farewell - green intermediate (the entire map is red int/green adv, but this screen is green int) 6. Square the Circle - red intermediate 5. Violet Depths - yellow advanced 3. Ferocious Sanctuary - red advanced 10. Mosaic Garden - yellow expert 4. Psychokinetic - red expert 2. kevintechspam.bin - green grandmaster 9. 74 - red grandmaster 8. Ivory - cracked grandmaster (green GM+1) 12. 2k-3 from D1D7 - GM+3 (for a long time this was the hardest Celeste screen ever beaten, check out ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-_5IeblnZ0U0.html)