minimal:
reqprocessor: 2.6 GHz Intel Core2 Duo or equivalent
reqgraphics: 1GB NVIDA 640 or better with driver version 352.55
reqmemory: 4 GB RAM
reqdiskspace: 20 GB available space
reqsystem: Ubuntu 14.04.02 (64bit) or SteamOS 2.0
reqother: Intel and AMD GPU's are not supported at time of release.

recommended:
reqprocessor: 3.4 GHz Intel i5 quad core or equivalent
reqgraphics: 2GB Nvidia 760 or better with driver version 352.55
reqmemory: 8 GB RAM
reqdiskspace: 20 GB available space
reqsystem: Ubuntu 14.04.02 (64bit) or SteamOS 2.0
reqother: Intel and AMD GPU's are not supported at time of release.