Posted by: Pyromancer
The extra disk included with ODST is essentially Halo 3, but it's just the multiplayer. If you've unlocked recon, it won't matter what disk you're using and your Xbox won't be able to tell the difference.
yeah but you need to have a b.net account with a linked gamertag to unlock it, then it will be put on your gamertag, and thats how you use it