Celeste is a truly difficult 2D platformer. VVVVVV follows behind. Metroid Dread is a cruel one.
F-ZERO X and GX are both racers with incredibly high skill ceilings. Which one is harder depends on what you're doing with the game. I'd argue GX has harder base gameplay, but X has harder speedruns.
I'll also mention Final Fantasy IV because it's shockingly difficult compared to the rest of the series. This one gave me a more game over screens than any of the others.
If the PS5 wasn't my first PlayStation ever, I'd probably be pretty disappointed with it. Kinda wish I held off and waited for this one, since I'd rather have it, but financing this just doesn't make sense in my current position. Would rather build a PC and use my Deck for remote play.
This is an aggressively mid generation, I have to admit.
Well this exploded, huh