Greg Coomer - Combine OverWiki, the original Half-Life wiki and Portal wiki

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Combine Over - Introduction: 314 URB-LOC 0017 Advisor, Airboat, Andrea Wicklund, Antlion Hill, Aperture Science Bomb, Aperture Science Crusher, Incinerator, Aperture Science Robot Worke

Steam közösség :: Útmutató :: The Character Information Guide

David Speyrer - Combine OverWiki, the original Half-Life wiki and Portal wiki

Ken Birdwell - Combine OverWiki, the original Half-Life wiki and Portal wiki

Communauté Steam :: Guide :: The Character Information Guide

Developer Commentary (Left 4 Dead), Left 4 Dead Wiki

Gabe Newell - Combine OverWiki, the original Half-Life wiki and Portal wiki

The real people used for character models : r/HalfLife

Combine Over - Introduction: 314 URB-LOC 0017 Advisor, Airboat, Andrea Wicklund, Antlion Hill, Aperture Science Bomb, Aperture Science Crusher, Incinerator, Aperture Science Robot Worke

Greg Coomer - Combine OverWiki, the original Half-Life wiki and Portal wiki

Ozioma Akagha - Combine OverWiki, the original Half-Life wiki and Portal wiki