The hard games/mods/challenge (W.I.P)
Emmm.... Just read the name

Casual hard
It may be difficult for a casual player, but an experienced one will get through it in no time.
The World's Hardest Game
Soulls like
Maincraft hardcore 1 hp
Getting Over It with Bennett Foddy
Sans fight
Roaring knight
Hard
May cause difficulties for an experienced player
hm 2 hard mode s rank
L4d2 realism expert solo
Project Zomboid - CDDA Challenge
katana zero hard mode without slowmo
buckshot roulette 100% achievements
Only Up!
Jump King
Flappy bird
Kenshi Hardcore Ultra Realism
Uglydance 0 (dance in nicos nextbots)
night 5 in gsaf
Path of Pain
pizza tower hardmode + lap 3 p rank
Extreme
Challenges an experienced player
hollow knight 5 panteon all bindings
Terraria calamity infernum
The Binding Of Isaac 3 dead god
The Evil Within akumu
Rain World Hunter
Postal 2 difficult POSTAL
I Wanna Be The Boshy
Nuclear Throne deep loop
Ghosts ‘n Goblins
I wanna be the guy
Trilogy kaizo mario world
rabi ribi end game
Patriarch s rank (the kremlin czar)(mod on hm 2)
Cupagoovno
Kaizo knight 2.0
Omori nemuri + double turns + no exp + higher HP x3
hollow knight any radiance mod 1.0
Noita nightmare mode
Insanity
It will take a LOT of weeks or months for an experienced player
Better then wolves on hardcore
Grace 500% or higher
Trilogy i wanna kill the kamilia
doom 1 pacifist ultra-violence
dark souls 3 ascended mod
hollow knight any radiance mod 2.0
Ultrakill brutal p rank all levels
dead cells 5 boss cells
pvz brutal extremal hardcore mode
Hades Heat 64
The hardests
on the edge of human capabilities (but still doable)
Last tis
dusttrust sans fight by FDY
acme (pain v4 roblox)
Ucn 50/40
а Stairway to Heaven (roblox)
Dashless+ celeste
touhou on lunatic
Crypt of the NecroDancer Coda
Top 1 demon in Geometry Dash
i wanna see the mayumushi
hollow knight any radiance mod 3.0
TASDifficulty
beyond human capabilities. Only TAS can accomplish this.
Illepidam Vitae Pritaelusem 239