OS: Windows XP, Windows Vista (32-bit; 64-bit versions of Vista are not supported) CPU: 2.0GHz or higher, or AMD equivalent, Vista - 2.2 GHZ RAM: 512 MB or more, Vista - 1GB RAM or more Disk Drive: 8x or faster DVD drive for retail SKUs, not required for digitally downloaded version Hard Drive: 6.0 GB or more of free space Video: GeForce4, ATI Radeon 8500 or greater (ATI Radeon 9200 and 9250 PCI, NVIDIA Geforce 4 MX cards not supported.). Windows Vista - NVIDIA GeForce 6100 or ATI Radeon 9500 or greater. Laptop versions of these chipsets may work but are not supported. Sound: DirectX 9.0c compatible sound card Network, Internet Multiplayer: 2 players (no voice support) 56 Kbps Internet connection; 2-8 players (with voice transmission) Broadband-class connection