See if you can jerk off with wet cement and if you can you have to shoot the jizz right into your mouth without missing a drop.

kicks my ass everytime

Battletoads on Snes emulator if u want real challenge.

ijji gunz google/youtube it lol

call of duty modern warfare 2
really nice game

try arcade games for older systems. like the ones where ur flying around in a ship killing other things. those are prolly the hardest games.

Vouch this. You kinda have to use the tactics system, but yeah... if you play in real-time without pauses for micromanagement, it can be pretty damn hard.

any FPS

lol Diablo, people can just buy fg and get gg gear. No skills in that.

Darkfall... Best game out there if thats what you want

Playing the game regular doesn't even have any skill to it. It's 100% luck and grinding.
Also, games that have a "wait" and "active" fighting system are pretty dumb if you choose active. My reasoning behind this is: If your team was fighting something I don't think your people would have to stop and think "Ok I want to cast lightning, let me just find it in this list, ok I got it, now let me select the person I want to cast it on." You would just know you wanted lightning and who you wanted to cast it on.

Ghosts and Goblins for the NES is pretty rough.