Spirit summons make most people ignore that this shit is sadistic
God of War II
Bad hard, again. Combat just becomes a 20 minute nightmare realm around the midgame on hard.
Geometry Dash
The bad kind of hard, man was not made to tap this fast
The Talos Principle
Some real 10,000 IQ puzzles here
Pathologic 2
MFW I load a save from 2 hours ago because I forgot to account for the slow decimation of my resources
Celeste: Farewell
4 Elden Rings worth of deaths on one level
Baldur's Gate
Late-game is packed with some underrail-esque nightmare fights
Blood
Total fucking nightmare that combines all the tough parts of classic FPS
Doom Eternal: The Ancient Gods - Part One
At one point there was a fight so unimaginably brutal that they had to patch it out, I literally couldn't crack it on nightmare after about 10 hours of attempts. Congratulations Holt Slayer Gate, you beat me.
UnderRail
Absolutely evil, even on normal this was easily the toughest time I've ever had with a game. You have to be a tactical combat character building guru to survive here.