Survivor: Bill

BILL: William "Bill" Overbeck is one of the four playable Survivors in Left 4 Dead, a Vietnam veteran who served in the US Army 1st Special Forces Group. His combat skills have helped to keep him alive. He is also the oldest of the group. In official media, he is usually seen wielding the Assault Rifle, probably to complement his back story. He often has a lit cigarette in his mouth that only extinguishes when he dies.

Bill is killed sometime prior to the events of Left 4 Dead 2's The Passing when he sacrificed himself to raise the bridge for the other three Survivors. Louis's sound files hint that Bill was possibly killed by a Tank.

It took two eventful tours in Vietnam, a handful of medals, a knee full of shrapnel, and an honorable discharge before the unthinkable happened: Bill ran out of wars. But now an army of infected has declared war on humanity. After decades of aimless drifting and dead-end jobs, Bill's finally gotten back the only thing he ever wanted: an enemy to fight. -Left 4 Dead Wiki

Bill from "Left 4 Dead"