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Relic AI Showdown | Endless AI War

“UNSC forces have crash landed on this remote island, and the Covenant defenders are not about to surrender it without a fight. Get ready for a hot day at the beach.”

*Fully updated to function with the MCC patch released on September 17th, 2025.*

Welcome to my next Halo 2 mod! If you were a fan of Coagulation AI Showdown, you’ll feel right at home here on AI Relic! The UNSC and Covenant are fighting for control over this Forerunner Island and structure, and only you can help turn the tide of this battle in your side’s favor! All of the popular features of Coagulation have been carried over to this mod, and there are also some new experiences to discover! This map is very addicting and fun, so get ready for some good times ahead. Good luck out there, and most importantly - enjoy!

• An endless AI War that will go on as long as the game lasts.
  
• Respawning placed weapons throughout the map.
  
• Pathfinding everywhere.
  
• Play as the Master Chief when fighting alongside the UNSC, and Arbiter when fighting alongside the Covenant.
  
• A large, diverse set of AI types on map that are chosen to spawn for all squads. This way each fight is different every time!
  
• Respawning placed vehicles on map, ready to drive.
  
• Dynamic checkpoint system, so players are no longer sent back to the level start if they die.
  
• A large pool of weapons that the AI of each faction can use. These are chosen at random with custom weighting.
  
• Enemy AI controlled Master Chief/Arbiter for each map version.
  
• Overshield and Active Camo powerups placed on map, respawning supported!
  
• AI behavior orders to make sure all bots participate in the battle effectively.
  
• New turret squads for each team.
  
• Scarab Gun placed at the top of the tower to mess around with!
  
• All skulls fully functional from Campaign.
  
• All 4 difficulties fully supported.

....And much more to experience!



Players will no longer be sent back to the beginning of the level upon death, thanks to the new checkpoint system I have gotten working. The game will now award you checkpoints automatically every few minutes. The system is dynamic, and will wait for players to be in a safe state before awarding one. This will help the map feel closer to a multiplayer experience despite being in campaign. Also, you can now save your progress from your session, and resume it in the future!



After you subscribe to the mod on Steam and let the download complete, launch the MCC with anti-cheat disabled (mods mode). Select Campaigns, then Halo 2 Anniversary, and locate Relic AI Showdown in the vertical list. Choose one of the two levels, configure game settings and load in as usual. The only difference between the two levels is the character you play as, the side you spawn on, and who your allied faction is. You are now good to go!



Originally I had wanted this map to function just like my Halo 3 AI Battles, where you can just fire the map up in Forge or Custom Games and have a blast. Halo 2 unfortunately strips out all AI, and all AI related scripts when compiling maps for multiplayer. So I had no choice but to move the experience over to Campaign. After getting the map running, I dug through the Bungie scripts and found some variables that would fit this map nicely, such as code to get weapons, vehicles, and powerups to respawn similarly to how they do in multiplayer. (Otherwise all placed items will only be able to be picked up once per game, and that would suck.) After tinkering with these for some time to get everything working as I wanted, the final result was actually pretty awesome. I have more cool items planned for this map in the future, but as it stands I feel the map works very well.