Characters played by Adam Dravean
Nihilanth
Characters played by Cris Mertens
VOX System Announcer
Characters played by Michael Tsarouhas
HECU Marines
Characters played by Kevin Sisk
Security Guard
Barney Calhoun
G-Man
Dr. Eli Vance
HEV Suit
Vortigaunts
Characters played by Janet Oliver Wilson
Black Ops Assassin
Characters played by Lurana Hillard
Female Scientist
Characters played by Mike Hillard
Dr. Isaac Kleiner
Scientist
Characters played by Victoria Teunissen
Tram Announcer
VOX System Announcer
Characters played by Kevan Brighting
Scientist