Yes! Halo 4 will have a Forge mode. The new features of the Halo 4 Forge were revealed at Rooster Teeth’s RTX event in Austin, Texas.
My favorite feature in the video was “Trait Zone”, which allows you to alter many things such as speed, gravity and the damage dealt from falls. That can all be triggered when you enter this “Trait Zone”, also you can enhance the player capabilities when he enters the zone or the complete opposite.
We can expect lots of new awesome maps and game modes from this, and I can’t wait till it comes out.Source: Destructoid