Aliens vs. Predator (1999)
- Minimum system requirements

Operating systems: Microsoft Windows 95,98,Me,2000 (XP Needs a patch) same for windows Vista and windows 7
CPU: Intel Pentium 200Mhz MMX PC or 100% Compatible
Memory: 32MB of Ram + DirectX 6.0 (included on CD)
CD-ROM Speed: 4X CD-ROM Drive
Graphics Card: Requires a Direct3D compatible 3D Accelerator Card 16 Bit (640 x 480)

- Recommended system requirements

Operating systems: Microsoft Windows 95,98,Me,2000 (XP and above Requires Patch)
CPU: Intel Pentium 400Mhz MMX PC or 100% Compatible
Memory: 128MB of RAM + DirectX 6.0 (included on CD)
CD-ROM: 24X CD-ROM Drive
Graphcis Card: 3DFX Voodoo II Graphics Accelerator Card


(Steam) Aliens vs. Predator - Classic 2000
- System Requirements

Operating systems: Windows XP, Windows Vista, Windows 7
Processor: Pentium II 400 MMX
Memory: 128MB
Graphics: DirectX compatible graphics card
DirectX®: DirectX 9.0c
Hard Drive: 500MB
Sound: DirectX compatible sound card
Controller Support: XBox 360 Controller for Windows

- Multiplayer Features

Integrated with Steam Overlay
Uses: Steam name
Host/Join games: via bare-bones in-game lobby browser
Can invite and join friends and others via the Steam overlay
Game attempts host migration
Dedicated servers are not supported or planned

(Note)
Aliens vs. Predator (1999) has been re-released on steam under the name Aliens vs. Predator Classic 2000, which has been heavily modified to work with the latest operating systems, sound cards and graphics cards. It's the same exact game as the orginal (1999); just a bit tuned up!