Metro Last Light (Ranger/NoHUD difficulty)

Most of CoD 4 and W@W on Veteran (2 or 3 missions left on each)

Round 32 on W@W's Verruct Nazi Zombie map (was considered the hardest of the maps, very difficult to reach upper 20's without some planning and luck on the box).

Also did a Pacifist/Ghost runthrough of Deus Ex HR (save for the bosses that you have to kill).

I would say Metro LL was the easiest as by the time I got to it I'd done several stealth playthroughs, so the routes were burned into memory, I knew where most gas mask filters where and didn't get lost, and weapon use was pretty much restricted to monsters only. Plus the stealth in that game had quite a bit of leeway. Deus Ex was hardest simply because of the bosses being unavoidable and bullet spongey when my character was focused on avoiding conflict entirely. W@W takes the cake for difficulty by just lobbing grenades at you and having most enemies carrying near-OHK bolt actions that a stray bullet could end you afterwards.

I'm with Flee. Pretty much every FPS I play on the hardest difficulty that is available.
The Crysis 3 one should be unlocked for supersoldier, but its glitched.

every guitar hero, and that's pretty much it

i'm not really interested in beating games on high difficulties if that's not the "definitive" way to play the game

i pretty much exclusively play on normal if that's the intended default standard version of the game

Nothing really sticks out tbh. Most fps games on hard are just about repetition. Maybe the resident evil games, hidden zombie and what not. Re7 got pretty hairy on the hardest setting.

All the Halo games, I don't care about other games as much to have ever done reruns

How about we challenge users to beat some games on the hardest difficulty.

Can anyone here beat Resident Evil 1 on hard?

I have my man