sadly not all but maybe you find something
STEAM
Beat Hazard
Darwinia
Darwinia, Multiwinia, Defcon, Uplink - Trust Is A Weakness (1 Key)
Dear Esther
dino-d day
Defense Grid: The Awakening
English Country Tune
Fairy Bloom Freesia
Gettysburg: Armoured Warfare
Greed: Black Border
Grotesque Tactics
Grotesque Tactics 2
Intrusion 2
Ironclads: Anthology
Oil Rush + DLC
Post Mortem
Shadowgrounds
SpaceChem
Tiny and Big in Granpda's Leftovers
Zombie Driver: Soundtrack
GAMERSGATE
Guilty Gear Isuka
Street Racing Syndicate
DESURA
Adventure Apes And Mayan Mystery
Blackwell Convergence, Blackwell Legacy, Blackwell Unbound (1 Key)
Blackwell Deception
Cognition - Episode 1
Cognition - Episode 2
Dungeons of Dredmor
Eleusis
FairyBloom Freesia
Gimbal
Hacker Evolution
Hacker Evolution Duality
Hacker Evolution Untold
Kill Fun Yeah
Radical Roach
StarDrone
...