Halo 3 ODST LASO

Completed Halo 3 ODST LASO and did not get the achievement. Went to the playlist and checked my progress and it said I did not complete the epilogue. Booted up the playlist where it said resume epilogue and it sent me back to Tayari Plaza. I spent over 22 hours doing LASO all for nothing I ask 343 that you give my achievement to me.

Did you get your achievement ?

> 2533274820377967;2:
> Did you get your achievement ?

no

This seems to be linked to coop play. I completed the ODST campaign in LASO with 2 others last weekend. We split it into 2 different sessions due to the length and I was the only one to get the achievement. We reviewed the progress everyone showed in the LASO and 1 person showed that they were missing the epilogue and the other was missing the prologue. The second person watched the prologue and confirmed that they now only need the epilogue however the way HALO is setup, you cannot choose a specific mission in LASO. Thus, both of the people must now complete the entire LASO all over again??!! That’s crap. Developers need to enable the mission select in playlists for this reason.

Please don’t revive old topics thanks