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My armor is contempt. My shield is disgust. My sword is hatred.
In the Emperor's name, let none survive.
Posted by: SlashingArbiter
You can install the ODST campaign disc, as the game was optimized for hard drive installation. However, since the Halo 3 Mythic disc is essentially Halo 3, you shouldn't install the multiplayer disc - otherwise, you may experience much longer load times in matchmaking.
Thank you for the information.