The Halo Odst Disk 2 comes with all maps (Plus 3 extra), and the ordinary Halo 3 disk comes with no added map packs, so you don't have another 12 maps.
If you mean the Multiplayer disk that came with ODST then yes, but if you mean the ODST campaign disk then no.
The ODST disk look for more help at bungie.net
There is no way to get it without the Halo 3: ODST Campaign disk.
You need the Halo 3:ODST campaign disk.
Yes.
The HALO REACH multiplayer beta is coming in May. When it does come out put your Halo 3 ODST game disk in and in should be on the Disk menu.
in halo 2 they have flaps to slow the landing
no
Yes that's the purpose of the multiplayer disk. the odst disk has online multiplayer to.(4 player co-op campaine and fire fight)
you have to have odst and it comes with an halo 3 mythic multiplayer disk and you get it with that
As far as I know, you can't because their isn't any online Option in Halo 3 ODST; Campaign Disk, BUT if you were to use the Multiplayer disk, you can get online/matchmaking, and play online, and get anywhere between 1 and 3 exp for games.
No, the Halo 3 game disk has both the campaign and multiplayer mode on it. What might seen confusing is in Halo: ODST, the game comes with two disks. One disk is for the Halo: ODST game and the second disk is for the Halo 3 multiplayer with all the latest map packs on it such as Mythic