Left 4 Dead!

[Gol22]

I'm totally an achievement whore, so I know what you're talking about there. Sometimes it's just a cheap way to force replays or artificially lengthen play time (ie. flag hunting in Assassin's Creed). Other times they're there to make you really work for them (ie. most of the achievements in the Guitar Hero games). But there's little else as satisfying as grabbing that 50G for completing a game on the hardest difficulty setting.

Ha! Same here actually... :P

I try to get all achievements for all my games, but some are just impossible and some are pretty tricky. The only game I actually was able to get every achievement was "Dead Space". Dunno how I managed it, but I had the patients and will to do it. The worst thing was to do two achievements at once. "Beat game on Hardest Difficulty (Impossible Mode)" and "Use Plasma Cutter only through whole game).

but... it was worth it! :D

As for Left 4 Dead. I'm just 1 achievement away from having them all. But I don't know how I'm goin' to get that.