minimal:
reqprocessor: Intel i-Series at 2GHz or AMD equivalent
reqgraphics: Vendor proprietary drivers, Nvidia GT500 series with 1GB RAM or better, ATI 5870HD with 1GB RAM or better
reqmemory: 8 GB RAM
reqdiskspace: 8 GB available space
reqsystem: SteamOS (64-bit) or Ubuntu 14.04 (64-bit)
reqother: OpenGL version 4.2, soundCard: OpenAL Soft compatible

recommended:
reqprocessor: Intel i5 (Quad) or i7 at 2.5GHz or AMD equivalent
reqgraphics: Vendor proprietary drivers, Nvidia GT600 series with 1GB RAM or better, ATI 6850HD with 1GB RAM or better
reqmemory: 12 GB RAM
reqdiskspace: 12 GB available space
reqsystem: SteamOS (64-bit) or Ubuntu 14.04 (64-bit)
reqother: OpenGL version 4.2, soundCard: OpenAL Soft compatible