I have tried to unlock this achievement over 20 times by now. I know for sure that I’m meeting the criteria because I even tried it co-op on Xbox, and the person I was playing with got the achievement but I didn’t. I’ve tried doing this on every difficulty mode, I’ve tried doing it on LASO, I’ve tried doing it via a playlist, I’ve tried doing either objective first, I’ve tried it both on PC and Xbox, both online and offline, and I’ve tried it without skulls on. Nothing I do makes this achievement pop.
I submitted a ticket about this on the Halo Support site, and the person who got assigned to the ticket gave me some very unhelpful things to do as if it was an issue with my PC, which is obviously not the case since it doesn’t work on Xbox either. Now the ticket is just sitting open without any new responses.
I haven’t put over 300 hours into this game just to get stonewalled by a technical issue that is in no way my fault or that I can do anything about. Halo is my favorite franchise and I was really looking forward to 100%ing the master chief collection after all this time and effort, but I guess that’s just not happening since no one seems to care enough to fix this problem.