Half-Life: 25th Anniversary Documentary

Kelly Bailey

Self

Yahn Bernier

Self

Ken Birdwell

Self

Steve Bond

Self

Dario Casali

Self

Greg Coomer

Self

John Guthrie

Self

Michael Harrington

Self (as Mike Harrington)

Brett Johnson

Self

Chuck Jones

Self

Marc Laidlaw

Self

Karen Laur

Self