I was specifically trying to get all the achievements in it in 1 run because I had borrowed it for just a weekend from a buddy of mine at my college. I got to the final boss and just unloaded everything. Fight ended in like 30 seconds.
I told him to check my achievements when I gave it back to him. I get a random Xbox live voice message of him just screaming “WHAT AAAAARE YOU!?” 10/10 would torture myself again.