Halo 3 Forge and Elephant images and details   These are the details on the feature in Halo 3 called Forge other known as "map editor". Here are the details: > Map editor (you're not making your own maps though) > Does not support geometry creation, or texture modification > Allows you to remove and place any items or vehicles or spawn points or  objectives,  etc... anywhere on the existing maps > For things like weapons you can tweak their respawn timer and ammo count and other minor things > You can have multiple people work in the Forge editor over Xbox Live! > You can also dynamically switch from creation mode to playing mode and run around in the game. > If you are "playing" in Forge and have other players in it, they can still change things! For instance, if you have a friend making a pyramid of fusion cores, you can return to "play" mode and lob a grenade in to destroy all his work! > Make your own kind of games in forge. Bungie gives the example of grab the mongoose. One player rides a mongoose while everyone else tries to grab it out from under him by removing it in Forge! Another is like a magic carpet ride where one player will stand on a object and a forge monitor will drag it along making the player ride it through the air. > Finally Bungie talked about how you can kind of make it into a real-time strategy  game (RTS) where you set up "teams" where each team has a monitor creating items for his team to use. >After editing/making a level you can upload it and anyone can download it.