OS: Windows Vista, Windows 7 or Windows 8 Processor: Intel Core 2 Duo @ 2.4Ghz or AMD Athlon X2 5400+ Memory: 2 GB RAM Graphics: Intel HD3000 or AMD HD2000 Series or NVIDIA Geforce 8000 Series Series Storage: 15 GB available space Sound Card: Direct X compatible soundcard Additional Notes: Supported Graphics Cards •Intel HD3000 Series, HD4000 Series, HD5000 Series • AMD Radeon HD2000 Series, HD3000 Series, HD4000 Series, HD5000 Series, HD6000 Series, HD7000 Series, R7 Series, R9 Series • NVIDIA GeForce 8000 Series, 9000 Series, GTX200 Series, GTX400 Series, GTX500 Series, GTX600 Series, GTX700 Series • AMD Fusion A8 or higher

OS: Mac OS 10.10.5 Processor: 1.8 GHz Memory: 4 MB RAM Graphics: 512 MB AMD 5000 series or better, Intel HD 4000 series or better and NVIDIA 600 series or better. New MacBooks are not supported (Intel HD 5300). Storage: 18 MB available space Additional Notes: The following graphics cards are not supported: ATI X1xxx series, ATI HD2xxx series, ATI HD3xxx series, ATI HD4xxx series, Intel GMA series, Intel HD3000, Intel HD5300, NVIDIA 8xxx series, NVIDIA 7xxx series, NVIDIA 9xxx series, NVIDIA 3xx series and NVIDIA 1xx series.

OS: Ubuntu 14.04.02 (64bit) or SteamOS 2.0 Processor: 2.6 GHz Intel Core2 Duo or equivalent Memory: 4 MB RAM Graphics: 1GB NVIDA 640 or better with driver version 352.55 Storage: 20 MB available space Additional Notes: Intel and AMD GPU's are not supported at time of release.