It's been 20 years since you've discovered the map room and released the Flood. Head back in and replay it in an entirely new setting and experience what it would have been like to search for Halo's control center after a Flood outbreak has ravaged the previously controlled island.
The map has been redesigned to offer a different experience than the original, both with enemy and friendly encounters and map flow.
Make sure to set pre-game graphics and audio set to classic to avoid bugs
Launch with anti-cheat enabled to play co-op
Modified -
AI have had health reworked to change the feel of fighting the flood to be slightly more exciting
Weapons have been adjusted to function and be proficient at longer ranges
All weapons except original Plasma weapons have zoom function added
All AI Encounters have been modified
*Rest would be spoilers
Added -
Halo 3 SMG and Plasma Rifle variants
Custom Scenery
Custom vehicle
Co-op Support
Recommend Heroic for Solo and Legendary Co-op for the best experience