Spec Ops: The Line. No seriously, I walked into this knowing it was all about the horrors of war and watching Walker fall apart from PTSD. I have PTSD; part of me was skeptical that they could do a decent job showing someone going through it, but all the while I still thought I knew what I was getting myself into.
But nothing could have prepared me for the white phosphorous scene halfway through. That was ****ing horrible. :c The ending was pretty awful, too, if you did the bad thing in the epilogue.. omg. :c