believer258 said:
Call of Duty 4: Modern Warfare.
Mile High Club.
On Veteran.
In less than a minute!
It took me something along the lines of two hours to finish it. That might not be long at first, but remember that I retried a level that only takes a literal minute to beat 120 times before finally getting the achievement.
I also tried Black Ops on Veteran. EEEEKKKK!!!! Treyarch is the devil when it comes to difficulties. I never did beat it, though.
My problem with any FPS on high difficulty is this:
You can't dodge a BULLET.
No matter how insane you are, you'll never ever EVER beat a FPS without getting hit. It's impossible. Skill can only do so much, like in Mario Kart.
I'd know. Halo 1-3 on Legendary was pretty bad.
Anyway, It's hard to say what I've done that was the toughest. On Meteos, I managed to get max score on a planet by keeping a single rocket in the air, covering the whole screen for almost 2 hours. On the Metroid Prime Hunters demo, I managed to get INSANE scores that were so high they went completely off the screen. (you got multipliers as you got kills without missing a single shot.) My aim was legendary in that game, and I continued the legacy online in the full game when I reached nearly-max rank (believe me, it's almost impossible with how it's set up) and managed to pull off headshots across the map while accounting for a half-second of lag. I've also gotten some perfect scores in Daigasso! Band Bros. Each one took hours of re-playing the part, because you have to hit every single note perfectly on-time and the game is really strict about timing the rhythm perfectly to get Best on each note. I've also made it to the end of Cave Story on Wiiware on Hard mode. Haven't beaten it yet because it's insanely hard, but I made it to the last boss in a 4-boss streak of battles a couple times. For the uninitiated, you don't get health upgrades or any unnecessary items on hard mode (aside from the single healing item and a health boost right near the end of the game) so for most of the game you die in one hit from almost everything.
I've done a lot of other insane stuff in games, but this is the most recent stuff that immediately comes to mind. I'm a real masochist, the kind of oldschool hardcore gamer who loves a great challenge.