OS: Microsoft Windows XP or Windows Vista (Windows 95/98/ME/2000 are unsupported) Processor: Intel Pentium 4 3.2 GHz or AMD Athlon 64 3200+ processor or better supported Memory: 1 GB RAM Graphics: 256 MB NVIDIA GeForce 6600GT or better or ATI Radeon 1600XT or better DirectX®: Microsoft DirectX(R) 9.0c Hard Drive: 12GB of free hard drive space Sound: 100% DirectX 9.0c compatible sound card Internet: Broadband connection and service required for Multiplayer Connectivity. Internet Connection required for activation. Co-op/Multiplayer Hosting: To host Co-op or MP matches, a 2Ghz dual-core or better processor is recommended.