Halo 3 and Halo ODST?

[Aslinn C]

Can Halo 3 players play on xbox live with Halo ODST players? I know that ODST is part of Halo 3 but wasn't sure they could be played as the same game.

 

[Sam]

It works on multiplayer. Odst comes with a second disc whcih is basicley halo 3 matchmaking with every map ever made on it and you play on the halo 3 live network

 

[That one Outcast]

I have done it before as long as its in matchmaking you will be able to