Windows
Requires a 64-bit processor and operating system OS: Microsoft Windows XP/Vista/7/8/8.1 (64-bit) Processor: Intel Core 2 Duo, 3.0GHz or AMD Athlon 64 X2 6400+, 3.2GHz Memory: 4 GB RAM Graphics: nVIDIA GeForce GTX 260, 512 MB or ATI Radeon HD 5670, 512 MB (Does not support Intel Integrated Graphics Cards) DirectX: Version 9.0c Network: Broadband Internet connection Storage: 4 GB available space