At the end of Pillar of Autumn, I hid behind the MAC gun until the ship was in position to be killed. I jumped up and successfully hit it. However, the anti-cheat system tagged twice. I wasn’t cheating. I posted the screenshot. The game booted me back to the menu, won’t load the epilogue, and I didn’t get the achievement for completing it. This was a Legendary run by the way. The mission selection says I beat it on Legendary but I still don’t have the achievement and I can’t load the Epilogue to finish the game.
I’m having the same problem. At the end of Pillar of Autumn the anti-cheat came up and I was really confused and Epilogue wont even Load properly. Lone Wolf seems to run just fine though. Please Fix (MCC for PC)
I am also having the same problem, I noticed it first during the cut-scene at the end of “the package”. It referenced an unknown map file. I now cannot even load “Pillar of Autumn” on Legendary without getting booted to the main menu.
Upon further inspection, my steam files had become inconsistent (maybe due to the halo 2 update?) Following the instructions on the link below helped me fix the issue: