CS with cis/turkish/balkan/middle east/mediterran/french teammates.
Easiest tho would be GTA, God of war or something
Sekiro/bloodborne are fun games, that take effort to learn but are rewarding, I wouldn't call them 'hard' unless you have dexterity issues. Tarkov is a stupid game to start without a reset.
Hard games are games that fuck you over no matter the skill, like Pathalogical or F&H.
soulsgames aren't that difficult tbf, once you get used to the mechanics it's smooth sailing from there
for me it's 5D chess with multiverse time travel (I don't have 4 digit IQ unfortunately) and after that soloq in eu, mm/faceit doesn't matter you always challenge your mental and sometimes the demons win and you join the zoo
Easily Geometry Dash. When you think youve done something hard, there's always something harder. At this point the best players are playing at 360fps, with some of the hardest levels having 50+ 60fps frame perfect inputs in them (6 frames of leeway every click, or 1/60th of a second), as well as some levels exceeding 8cps all the while every click having small timing windows. all of which need to be done perfectly without fail. Its brutal to begin with and as you get better it only gets harder and there is no ceiling.
Habbo. No matter how much you work for the army, they never pay you unless you use a female char. I did a lot of work there (a lot) but never got a single coin out of it. Very cool though. Prostate touch there was always nice too.
I'm bad at gaming that's why i'll say Dead cells
Souls games aren't even hard cus you get infinite tries, i think a game like Path of Exile hardcore mode is harder cus if you die you lose your character and you need to start from 0.
Kaizo rom-hacks or I wanna be the guy clones are just purely unforgiving.
I played Battle Toads on a old console in my cousin's house once, most frustrating thing I can remember
Kerbal Space Program (should clarify, without any mods/cheats)
ninja gaiden 2, such bullshit game getting hit by enemies off screen
tarkov is brutal but getting consistently bodied by nolifers/cheaters gets tiring
sekiro becomes piss easy once you understand the game