Armored Core for Answer for xbox 360, more specifically, the Final Mission on the Path of Destruction, on Hardmode, you and Old King Vs 5 SS Rank Next pilots. Old King always just shits his pants and died within the first 15-20 seconds, leaving you to clean up. Never in all my experiences with End boss's/level have i raged so fracking much. Until i spent like 5 days designing an unbeatable PA Argyros Hybrid Fortress NEXT. then it took me literally 2-3 trys after i finished the design to win, that schematic was unstoppable, even against Twin Moonlight Lazer Blade Overboost NEXTS, id just destroy them and move on.