- last post: 01.01.0001 12:00 AM PDT
It's not an install disc. It's Halo 3's Multiplayer. You don't download anything. ODST's second disc is exactly like Halo 2's Multiplayer Map Pack Disc. You play the maps straight from the second disc. As far as I know, these maps DO NOT go onto your Halo 3 disc with Campaign.