Halo 3: ODST Multiplayer/ Halo 3 Multiplayer disk question?

No Firefight doesn't have a MM option. Bungie was to lazy to set up a server for it. You have to play with friends who you invite.

Halo 3 ODST is a single player game where you can play coop thru xbox live or system link or in split screen.

Firefight mode is the same, except you can have up to 4 players thru xbox live and system link. No online match making. I dont like this feature, but what can you do.

The halo 3 multiplayer disk gives you all the halo 3 multiplayer maps plus 2 maps exclusive to the disk. you have full access to matchmaking with xbox live gold, and you can play with others who have the original halo 3 disc. they cannot, though, play on the 2 maps exclusive to your disc. the thing is you cant play the campaign for halo 3. so just borrow the game if you want to play that.

You cannot. ODST has other features which would overlap Halo 3's multiplayer features, therefore causing glitching.

there is no live for firefight so you just kinda play by your self or locally but on the halo mythic bonus disc make sure you are connected to live and go into matchmaking and you can join random multiplayer match hope i helped =)