PS3: Dynasty Warriors Gundam 3, Assassin's Creed Revelations. My playthrough attempts were interrupted by the fact that my first PS3 was dying, therefore causing the games to freeze.
Non-PS3: Mega Man X Command Mission. 9 years. It's just so boring. I finally played through it a couple of months ago. I'll never play it again. I imagine that Castlevania Lords of Shadow will overtake Command Mission though; I have no desire to finish it. It's just a bore.
I am a nontheist, a nihilist. And I'm sure god loves me anyway.