Why can't I play KOTH on my map?

I made a map in one of halo 2s forge type worlds. It is meant for multi team stuff and when I go to custom games there isn’t even an option to play a multitude of game modes. KOTH, oddball, etc. All it lets me choose is slayer, infection, and juggernaut. What’s up with this 343?

So I have not played with the Forge yet but I know that in Halo 4 when you forged you had to forge in the gametype you wanted so that you could set the flags on your objectives to label them for which gametype you wanted. It may be that you do not have these flags set so the game does not recognize KoTH as an available gametype for your map.

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> So I have not played with the Forge yet but I know that in Halo 4 when you forged you had to forge in the gametype you wanted so that you could set the flags on your objectives to label them for which gametype you wanted. It may be that you do not have these flags set so the game does not recognize KoTH as an available gametype for your map.

I did forge in the gametype and I did place all the hills and objectives and whatnot. Yet still not available.