Developer | Gearbox Software Valve |
Publisher | Sierra On-Line Valve |
Canceled | 16 de junho de 2001 |
Released | 31 de julho de 2013 24 de agosto de 2005 12 de junho de 2001 |
Website |
Steam product page |
Action Shooter |
Historical period |
Contemporary history |
Perspective |
First-person |
Presentation |
3D |
Setting genre |
Science fiction |
Supernatural beings |
Zombies |
Type of events |
Fictitious events |
World |
Fictitious world Real world |