To get started, install "halocesetup_en_1.00.exe", then install "haloce-patch-1.0.10.exe". After that, you can run the game.

Some addons are included here to improve the user experience. dsoal improves audio quality, chimera and HAC2 improve quality of life, with features such as FOV editing and widescreen support.

A good selection of custom maps are included in the maps folder. There is also the refined campaign/multiplayer mod, which faithfully recreates the original Xbox experience.