In no particular order:
Lone Survivor
Oblivion
L.A. Noire
Fallout 2
Fallout Tactics
Runaway
The Misadventures of P.B. Winterbottom
Alice Madness Returns
The Baconing
Defense Grid: The Awakening
Metro 2033
Atom Zombie Smasher
Dead Space
Dead Space 2
Deus Ex Invisible War
Assassin's Creed
Assassin's Creed II
Assassins Creed Brotherhood
Cthulhu Saves the World
Breath of Death VII
Far Cry 2
Psychonauts
Grand Theft Auto IV
S.T.A.L.K.E.R. Shadow of Chernobyl
Full Time Job + Life + Steam Sales = Not enough time!!!