I know how to make gametypes, but I have seen other completely customized gamemodes. Like in the list with slayer KOTH infection and ect. I wanted to know how to make those.
You're probably thinking of Safe Havens. It's a built in gametype that is infection with a randomly rotating "hill" that gives special traits to humans within its area. Anyways, this forum is for questions about the site, Forge Hub, itself; you can post questions about Halo Reach in the Halo Reach Discussion, or Halo Reach Forge Discussion forums.