minimal:
reqprocessor: Dual-core 2.2 GHz
reqgraphics: nVidia GeForce 8600/9600GT 512MB VRAM, ATI/AMD Radeon HD2600/3600 512MB VRAM
reqmemory: 2 GB RAM
reqdiskspace: 5 GB available space
reqsystem: Ubuntu 14.04
reqother: OpenGL: 2.1 or higher; Ubuntu 12.04 can run the legacy version of the game, but it is no longer being updated.

recommended:
reqprocessor: Quad-core 3.2 GHz
reqgraphics: nVidia GeForce 480 GTX 1GB VRAM, ATI/AMD Radeon HD 5870 1GB VRAM
reqmemory: 4 GB RAM
reqdiskspace: 8 GB available space
reqsystem: Ubuntu 14.04
reqother: OpenGL: 2.1 or higher