In order for you to play Return to Castle Wolfenstein on Windows with minimal graphics settings, your computer must meet the following requirements
3-D Hardware Accelerator (with 16MB VRAM with full OpenGL® support; Pentium® II 400 Mhz processor or Athlon® processor; English version of Windows® 2000/XP Operating System; 128 MB RAM; 16-bit high color video mode; 800 MB of uncompressed hard disk space for game files (Minimum Install), plus 300 MB for the Windows swap file; a 100% Windows® 2000/XP compatible computer system (including compatible 32-bit drivers for video card, sound card and input devices); 100% DirectX® 8.0a (included); 100% DirectX 3.0 or higher compatible sound card and drivers; 100% Microsoft-compatible mouse/keyboard and driver
Multiplayer Requirements:
Internet (TCP/IP) and LAN (TCP/IP and IPX) play supported, Internet play requires a 100% Windows 2000/XP compatible 56.6 Kbps (or faster) modem