Alan Wake
Borderlands 2
Broforce
Catherine Classic
Child of Light
D4: Dark Dreams Don't Die -Season One-
Dead Island
Deponia
Dota 2
Dreamfall Chapters
Half-life 2
Half-life 2: Episode 1
Half-life 2: Episode 2
Hotline Miami
Incredipede (not sure)
J.U.L.I.A.: Among the Stars
Life is Strange
Neighboors from Hell
Portal
Portal 2
Quake IV
Saints Row 3
Saints Row IV
SAMOLIOTIK
Serena
Trauma
The Stanley Parable
The Witcher
Valiant Hearts

Small ones:
9.03m
Carpe Diem
The Plan
The Way of Life

Currently playing list: (just info for myself)
Contrast
Danganronpa: Trigger Happy Havoc
Mark of the Ninja
Portal Stories: Mel
Seraph
Shadow Warrior (2013)
Unepic

Dropped:
Euro Truck Simulator 2
Homefront
Orcs Must Die!
Red Shirt
Surgeon Simulator 2013