- Bapabooiee
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- Fabled Legendary Member
ODST comes with two discs: One comes with, of course, ODST -- which includes single player and Fire Fight -- and the other includes a traditional Halo 3 multiplayer disc.
Players playing with the current release of Halo 3, and via the 2nd disc can both play together. The only difference is the latter includes all the Halo 3 maps on the disc.
As ODST has no multiplayer component (save co-op and Fire Fight), it doesn't include Forge.