Psh I have at least double this guy's kills in Battlefield 3 and probably 10 times that in Halo 3...
This guy named Chris Kyle had 255 kills during his 4 tours of Iraq, and 160 of them were "confirmed" by the Pentagon. In the US military a confirmed kill is when an officer witnesses and records the kill by examining the body so obviously they can't confirm every kill.
The insurgents called him "the Devil of Ramadi" and put a $20,000 bounty on his head.
If this doesn't earn you the title of "total badass", I don't know what does. I mean this probably even tops Rambo and he's fictional!
He used a .300 Winchester Magnum.
The old US record was 109 by an Army sniper during Vietnam. And the world record was by a Finnish sniper in WWII who killed 542 Soviet soldiers.