Developer: Valve Publisher: Valve Release Date: 18 Apr, 2011 Genre: Puzzle, Sci-fi, Adventure, Action, Strategy System Requirements Minimum: OS: Windows 7 / Vista / XP Processor: 3.0 GHz P4, Dual Core 2.0 (or higher) or AMD64X2 (or higher) Memory: 2 GB RAM Graphics: Video card must be 128 MB or Continue Reading
Menu