to get onto theater mode you must first have an xbox 360 hard drive, then go onto the main menu of halo 3 and scroll down to theater.
All you have to do to view (or record) your clips in Halo 3 is to go to Theater mode.
u need a capture card which takes videos from halo 3 theater and puts em on the computer
Yes, there will be Forge mode in Halo 3: ODST... but on the other hand there is two discs so there might not be in the halo ODST disc.:)
haw to make mode maps in halo 3
You can use the in game theater mode to watch replays, and do cool stuff, but if you want to actually record a film, you'll need a capture card.
Halo 3 has a mode called custom games where you can play Slayer , Team Slayer, Infection, Capture the Flag, Assault, and much more! They also have a mode called Forge where you can edit objects in the map with/without friends. They have a major mode called Campaign where you play the story. You can also play with/without friends. Lastly, there is a mode called Theater where you can watch your recent games and films. - Henry
in sandbox mode
Forge mode
yes
Forge.
co op mission mode