I used to play Mortal Kombat all the time, and got really good at it. I beat it every time. But since it's been forever since I've played it, I'm rusty as hell, so I honestly suck now. But being rusty aside, most of the games from my library that I truly suck at are just a couple ROM-hacks. I'm not the best at South Park The Fractured But Whole. Breath Of The Wild is kicking my ass at the moment, but that's because I'm a noob. I was never able to master any Metroid games. There's a couple Zelda games on Game Boy that I'm not particularly good at. Darkstone on PS1 is a bitch and a half, that I have yet to even figure out. That's all I can thin of at the moment.