Just putting it out there that halo MCC now has a custom server browser and it’s pretty awesome. I highly recommend it.

Been talking to some friends that had no idea this was a thing, thought I would spread the word for you guys!

Edit: trying to make a custom game mode myself but can’t get anyone to join unfortunately.

Edit 2: I got some games going and it was pretty fun. Made a doom style hybrid mode that was a lot of fun. The map was like a larger version of cod shipment. Speed and damage was doubled, takes about 2 headshots to kill.