I'm making a KotH map/game variant. But for some reason my map is incompatible with ANY KotH variant. Even though my map has a Hill on it. What am I doing wrong?
Select the hill object, press 'X' to open the properties menu, select 'Advanced' and navigate down to the list of object labels. You can cycle through them to see the options for whatever gametype you're forging under. If you're using 'Basic Editing' I don't think you get any options at all though.
Hmm. Well, maybe this will help. If not, it could very well be some sort of bug. Halo 4 Forge Tutorial - KOTH, Oddball, and CTF Setup - YouTube