Half-Life: 25th Anniversary Documentary

Marc Laidlaw

Self

Gabe Newell

Self

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

Karen Laur

Self

Dave Riller

Self

Jay Stelly

Self

Harry Teasley

Self

Steve Theodore

Self

Bill van Buren

Self

Douglas Wood

Self (as Doug Wood)