OS: Windows XP SP2, Windows Vista 32-bit and 64-bit Processor: Intel Core 2 Duo E4300 or AMD Athlon X2 +3800 * Memory: 2 GB RAM Hard Drive Space: 9 GB free hard disk space DVD-Rom Drive: Dual layer, 8X speed or faster Video Card: ATI Radeon X1800-series 512 MB, Intel G45 Express Chipset, NVIDIA GeForce 8400 512MB** Sound: DirectX 9.0c-compatible sound card Direct X: DirectX version 9.0c (included) or higher Input: Keyboard, mouse, or Xbox 360 gamepad Other: Internet connection required for first-time authentication (connection not required after authentication) * Dual core processors, such as the Intel Pentium D 805, are not supported. ** Video cards that have only 256MB of RAM are not supported.