Operating System

• "Halo 2" works only on Windows Vista and requires DirectX 9.0c or later.
  
  

Processor

• While "Halo 2" requires only a 2 GHz Intel Pentium M or AMD Athlon XP 2000+ processor, a 3 GHz Pentium 4, AMD Athlon XP 3000+ or better is recommended.
  
  

Memory

• You need 1 GB RAM, 7 GB hard drive space and 128 MB of video memory to run "Halo 2."
  
  

Audio and Video Cards

• "Halo 2" requires a DirectX-compatible sound card and at least an Nvidia Geforce 6100 or ATI Radeon X700 Series graphics card with pixel and vertex shaders of version 2 or higher. However, an Nvidia Geforce 7800 or ATI Radeon X1800 graphics card is recommended.
  
  

Controls and DVD-Rom Drive

• "Halo 2" is available only on a DVD, so you need a DVD-Rom Drive to play it. "Halo 2" may be played with a keyboard and mouse or with an Xbox 360 gamepad.