About this deal


- Addictive co-op action gameplay from the makers of Counter-Strike and Half-Life
- Advanced artificial intelligence drives both friendly and unfriendly creatures to dynamically create intense single-player, co-op, and multiplayer experiences every time the game is played
- 20 new maps. 10 new weapons. Four sprawling campaigns.
- Match making, stats, rankings, and awards system drive collaborative play
- Designer's Commentary mode allows gamers to go "behind the scenes" of the game.
- Powered by Source and Steam.

Free UK shipping. 15 day free returns.
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