- LordOfBlah51
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- Exalted Mythic Member
On the original Halo 3 disc, that does not come with ODST, you cannot get the Mythic Map Pack 2 Achievements, since those maps are on the ODST Disc 2. Who knows though, they will probably change the ODST disc so that MMP2 will be able to Download once you put the disc in, so it will run for both Discs of Halo 3.