This is just Theodor's Gamelist but remixed by me :) These are cherry picked games that I actually put some effort in instead of just "making it hard". Good Luck! By the way: Goldening any of the G.P Celeste games here probably buffs the difficulty by either 1-2 stars higher than their difficulty. Such as G.P Celeste Void, buffed if beaten with a golden strawberry (well, there is no golden strawberry, but let's say that you beat the game without dying), the difficulty would be around 6-star difficulty as the maximum output.
5* difficulty are the ones that are either really tedious or stupid hard to beat. 6* difficulty are the ones that were made specifically for their difficulty and are well known for because of their immense difficulty. G.P Celeste R6-Side is a buffed version of an already buffed version of R-Side. There are frame perfect and even pixel perfect precision required to beat this mod. It Always Ends The Same is a buffed version of 8/20 All Challenges but having their own twist of faster KT and punishing gameplay. The up arrows and down arrows are made for higher end or lower end of difficulty levels respectively.