This is a collection of all Halo: Combat Evolved campaign overhauls presently on the Steam Workshop (that I could find). I'll try and keep this collection updated semi-regularly.

NOTES:
➣ My definition of "campaign overhaul" is a modification or expansion to the vanilla campaign. I've got a separate collection for custom, standalone campaign/firefight content (link below).
➣ This collection is not an endorsement of the content within it. This is supposed to be an archive of ALL available Halo CE custom campaign and firefight missions, regardless of quality (exceptions below).
➣ Mods that are NOT included in the collection:
- Mods with only cosmetic changes (i.e. "Play As Your Own Spartan")
- Mods where the only change is god-mode
- Mods with no enemies/goal (i.e. Digsite missions which show off unused level exteriors)
- Mods that have no description/images
- Mods that have been broken for over a year and show no sign of being fixed (if an old mod doesn't work, let me know and I'll remove it)
➣ Mods are sorted based on star rating first, and then release date (newest > oldest). Ratings change so I'll try to update the order periodically.
➣ This collection includes English mods only.

My Halo mod collections:
➣ Halo CE: Campaign Overhauls
➣ Halo CE: Custom Campaign/Firefight
➣ Halo 2: Campaign Overhauls
➣ Halo 2: Custom Campaign/Firefight
➣ Halo 3: Campaign Overhauls
➣ Halo 3: Custom Campaign/Firefight
➣ Halo 3 ODST: Campaign Overhauls
➣ Halo 3 ODST: Custom Campaign/Firefight
➣ Halo Reach: Campaign Overhauls
➣ Halo Reach: Custom Campaign/Firefight
➣ Halo 4: Campaign Overhauls
➣ Halo 4: Custom Campaign/Firefight/Spartan Ops