Please refer to your hardware manufacturer for 100% DirectX 9.0b compatibility. Important Note: Some 3D accelerator cards with the chipset listed here may not be compatible with the 3D accelerator features utilized by Doom 3. Supported Chipsets: ATI RadeonTM 8500, ATI RadeonTM 9000, ATI RadeonTM 9200, ATI RadeonTM 9500, ATI RadeonTM 9600, ATI RadeonTM 9700, ATI RadeonTM 9800, all nVidia GeForceTM 3/Ti series, all nVidia GeForceTM 4MX series, all nVidia GeForceTM 4/Ti series, all nVidia GeForceTM FX series, nVidia GeForceTM 6800 Multiplayer Requirements: Internet (TCP/IP) and LAN (TCP/IP) play supported, Internet play requires broadband connection and latest drivers, LAN play requires network interface card and latest drivers Sound: 100% DirectX 9.0b compatible 16-bit sound card and the latest drivers Hard Drive: 2.2 GB of uncompressed free hard disk space (plus 400 MB for Windows swap file) Graphics: 100% DirectX 9.0b compatible 64MB Hardware Accelerated video card and the lateset drivers Processor: Pentium IV 1.5 GHz or Athlon XP 1500+ processor or higher OS: Microsoft Windows 2000/XP (Does not support Windows Vista/7) Steam account required for game activation and installation M - Mature (Blood and Gore, Intense Violence, Strong Language)