Minimum: OS: Windows XP/Vista Processor: Intel Pentium 4 2.0 GHz and up Memory: 1 GB RAM Graphics: DirectX 9.0c/Shader3.0 and up supported (operation on-board is not guaranteed) Video: NVIDIA GeForce 6600 and up (except for NVIDIA GeForce 7300), VRAM: 256MB and up (operation sharing with main memory is not guaranteed) Hard Drive: 4.5 GB free hard drive space Sound: DirectSound, DirectX9.0c Compatible Audio Other Requirements: Online play requires software installation of and log-in to Games For Windows - LIVE