Demon's Souls
God of War
Bayonetta
Batman Arkham Asylum
Borderlands 1
Burnout Paradise
Star Wars force unleashed
Shadow of the Colossus
LA Noire
Dragon Age: Origins
Deus Ex: Human Revolution
Ratchet & Clank: A Crack in Time
Just Cause 2
Walk Dead
Fallout 3 / New Vegas
Mega Man 10
Critter Crunch
Sly Coopers
Bioshock
Dishonored
Need for Speed: Most Wanted
Far Cry 3
Mass Effect 2
Enslaved
Bionic Commando Rearmed
Red Faction Guerrilla
You owned all of them at some point and didn't play any of them very long, print out the list, toss a dart and you can't go wrong hitting any of them. If you want something shorter. Bionic Commando Rearmed, Star Wars Force Unleashed, Critter Crunch, Walking Dead, Mega Man 10. Though something that is fun, good, and not that stressful is Ratchet and Clank: Crack in Time, I think it's in the 13-15 hour range maybe.