Is Halo 3 compatible for Windows 7?

Halo 3 is not natively compatible with Windows 7, as it was originally released exclusively for the Xbox 360. However, players can still experience Halo 3 through the Halo: The Master Chief Collection, which is available on PC and supports Windows 10. For Windows 7 users, the best option would be to upgrade to a compatible operating system to play the game.