So me and my brother were playing the master Chief collection we’ve beaten Halo 3 and 4 LASO and then we attempted Halo 2. We finished the playlist and I have it 15/15 and we haven’t gotten the achievement. I am only worked up about this because this was very difficult and the first mission took us 6 hours in one sitting to beat. Not sure what’s wrong.
You should try to hard reset your xbox. If it doesn’t work, i’d recommend you report your situation in this thread (providing a picture of your LASO completion helps)
Hopefully you won’t have to run through it again solo. Halo 2 solo LASO can be nightmarish at parts lol