Forge
There will be "3 large environments"
When over an object, the object will be highlighted
There is now a "lock" object feature
You can duplicate objects (without finding the object in the menus again)
There is now a "magnet" system where you can easily connect objects to other objects. (Makes a bridge perfectly aligned. Also works for walls, structures, etc.)
Dynamic lighting for all Foregable objects (accepts shadows from the environment and casts shadows as well)
Hinted that objects will change to match the theme of the map
You can make zones (much like Reach) and when in the zone, the player's traits will change (speed, gravity, health, etc.)
They made a playable H.O.R.S.E. map in Halo 4's Forge
New purple "volumes" that will affect players and vehicles. It can boost them, slow them down, and move them to the sides
No weather settings for Forge
No undo feature for Forge. An undo feature is a "huge undertaking", "the magnet feature will hopefully reduce mistakes."
New weapons
Light Rifle (Promethean) - It will have a fast rate of fire when out of zoom. When in zoom, it will have a slower rate of fire.
Human Shotgun (officially announced)
Not Forge related
When damaged, unlike the E3 build (red arrows near reticule), the red damage indicator is on the sides of the screen.
Next to the player's name while in-game (bottom right corner, not the in-game lobby), their emblem shows up
Impressive lighting on weapons
Trip Mines confirmed
Saw first-person view of the Banshee
Spartan Ops will be playable at Comic-Con
There will be a "huge" amount of book cannon in Halo 4
Lowering and dropping weapons will be supported in multiplayer
Characters specific to the end of Ghost of Onyx will not be in Halo 4. Their stories will be "cleaned up."
