Bill Overbeck (Left 4 Dead)

William "Bill" Overbeck is one of the four playable Survivors in Left 4 Dead.
He is a Vietnam veteran who served in the US Army 1st Special Forces Group, and is also noticeably the oldest of the group. He is usually seen wielding the Assault Rifle (which appears as the M16, a real life assault rifle used by the U.S. Military in Vietnam), probably to complement his back story. He often has a lit cigarette in his mouth that only extinguishes when he dies.