WindowsOS:Windows 10 / 8.1 / 7 / Vista SP2 / XP SP3Processor:Intel Pentium 4 1.8 GHz or EquivalentMemory:512 MB RAMGraphics:128 MB DirectX 9.0c Compatible Video Card w/Pixel Shader 2.0 SupportDirectX®:dx90cHard Drive:4 GB HD spaceSound:DirectX 9.0c Compatible Sound CardOther Requirements:Broadband Internet connection, also to activate this game you must create a Stardock account while launching the game on Steam.