OS: XP/Vista/Windows 7 Processor: Dual-core processor (Intel Core 2 Duo 2.4 GHz or AMD Athlon X2 5200+ 2.6 GHz) Memory: 1.5 GB RAM Hard Drive: 2.0 GB free space Graphics: DirectX 9.0c/Shader3.0 compatible, VRAM 512 MB (NVIDIA GeForce 7800 series or ATI Radeon X1900) Sound: DirectX 9.0c compatible sound cards DirectX®: DirectX 9.0c