GameSpy: The Worst Achievements Ever

[SecondWar]

With the Overkill one you dont have to be a whining 12 to get it, you can do it by getting a bit of luck and having 4 zombies near you on ranked living dead with a shotgun out.

And you missed one, its 'Press start to play' from The Simpsons game, which is full with a bunch of stupid achievements.