Windows
Minimum:OS: Windows XP+Processor: 1.2 GHz Pentium 4Memory: 400 MB RAMStorage: 270 MB available space
Linux
Minimum:OS: Ubuntu 12.04 or higher; SteamOSProcessor: 1.2 GHz Pentium 4Memory: 400 MB RAMGraphics: OpenGL compatible cardStorage: 270 MB available space
Mac
Minimum:OS: OS X 10.6Processor: Any 64 bit processorMemory: 400 MB RAMGraphics: 1280 x 720Storage: 270 MB available space