Minimum system requirements Windows XP/Vista/Windows 7 2.2 GHz CPU 1 GB RAM (2+ recommended on Vista or Windows 7) 900 MB HD Space 256 MB graphics accelerator (NVIDIA GeForce 7800 or better class, ATI Radeon 1800 class or better) DirectX 9 compatible sound card DirectX 9.0 Recommended system requirements Dual or Quad Core Processor 2.2+ GHz 2 GB RAM 900 MB HD Space 512 MB video card: GeForce GTS 250 or better, ATI Radeon HD 4850 or better