PC versionXbox 360WIP Fans have made a PC version. Some are still early, so read the project page first.
Fans took Halo 3: Mythic 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:
Open Halo 3 Mythic: native Windows recompilation of the Halo 3 Mythic multiplayer disc.