Veknoid_Outcast on 04 December 2014
The winner, coming in over 60 hours, is Demon's Souls. Just beat it last month, and loved every minute of it. Even those frustrating, throw-the-controller-at-the-TV minutes 
Other than that, I didn't play many long games this year. They were mostly short 10-20 hour affairs. The second-place game, believe it or not, might have been Super Mario Galaxy 2. With over 200 stars to collect, it took a good chunk of time.
