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| Release Date | November 17, 2009 |
| Publisher | Valve, Turtle Rock Studios, Valve |
| Total Rating | 85% |
| Content Rated | M (Mature) |
| Game Modes | Single player, Multiplayer, Co-operative |
| Player Perspectives | First person |
| Genres | Shooter |
| Themes | Action, Horror, Survival |
| Platforms | Linux, PC (Microsoft Windows), Xbox 360, Mac |
