Bill

William 'Bill' Overbeck is one of the Survivors, 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 backstory. He is voiced by Jim French.

Official description
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 undead 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.

Trivia
On the poster for Dead Air, his beret has a blue, star bordered U.S. Army General Service Beret flash on it, not the Yellow U.S. army 1st Special Forces Group beret flash as appears in the game, and on the rest of the posters.

Quotes

 * [Hospital elevator, responding to Zoey questioning if things will return to normal]"I'm gonna see peace on Earth if I have to murder every single one of these bastards with my bare hands."
 * "Check your fire!"
 * [ Picking up a pipe bomb ] "I'd rather have a grenade, but this'll do."
 * "Some zombie apocalypse this is nothing compared to the great zombie attack of 56!" "...Nah, I'm horse shittin ya!"
 * "Reeloooaaaadiiiing!"