Halo 2 System Requirements

Operating System: Windows Vista / 7
Processor: Intel Pentium IV running at 2.0 GHz or AMD equivalent
Memory: 1 GB of RAM
Hard Drive: 7 GB or more
Video Card: 128 MB with Pixel Shader 2.0 support (GeForce 6100 or ATI X700)
Sound Card: DirectX compatible
Optical Drive: DVD-ROM running at 4X
DirectX: DirectX 9.0c
Input: Keyboard & Moused
Internet: LAN connection for LAN multiplayer gameplay or Broadband connection for Windows Live multiplayer gameplay