Michael Futter writes: There have been a few games this generation that have evoked memorable reactions upon completion. I jumped out of my chair at the end of Mass Effect 2. I stared at the screen with my jaw dropped when I finished Batman: Arkham City. At the conclusion of Spec Ops: The Line, I removed my headset, blinked a couple of times and wondered how a military shooter could possibly leave such a deep and troubling impression on me. I will never forget this game.