Kind of hard to say. I completed Mass Effect 3 and that's a long game that took a long time to beat, so there's a chance hour-wise that that's it... but since beating, I've hardly touched it. In terms of frequency of play, it's definitely Nintendo Land and Tekken Tag Tournament 2, both of which get played as much now as when I got them, but it's obviously for much much shorter stints when people are over. I can't be certain if that, added up, my time playing those has surpassed ME3.
Is there a way to check? Although, I accidentally left Darksiders 2 on for, like, a week where I was insanely busy and had no time to play, so any records would likely tell me that, and I never even finished it because it was a GameFly rental and I got antsy for something else.
