minimal:
reqprocessor: Intel or AMD Single Core CPU
reqgraphics: Graphics card with Shader 3.0 support and 128 MB RAM
reqmemory: 512 MB RAM
reqdiskspace: 1 GB
reqsystem: Ubuntu 16.04 LTS or SteamOS
recommended:
reqprocessor: Intel or AMD Multi-Core CPU with 2.0 GHz
reqgraphics: Graphics card with Shader 3.0 support and 256 MB RAM
reqmemory: 1 GB RAM
reqdiskspace: 2 GB HD
reqsystem: Ubuntu 16.04 LTS or SteamOS