PC versionXbox 360WIP Fans have made a PC version. Some are still early, so read the project page first.
Fans took Call of Duty 4: Modern Warfare (360 multiplayer) apart and rebuilt it so it runs natively on a computer, often with widescreen, higher frame rates and mods. Here is the project we know about:
Recompiled Xbox 360 Call of Duty 4 MULTIPLAYER (iw3mp) on ReXGlue — Bot Warfare bots fully playing in System Link