I have Steam keys for the following games, just ask me. I give them for free, better in someone library than never used. Games all come from Humble Bundle subscriptions, these are the ones I'm not willing to play

Alien: Isolation
Aurion: Legacy of the Kori-Odan
Bioshock and Bioshock Infinite
Broken Age
Burnout Paradise Ultimate Box
Crash Bandicoot Trilogy
Chroma Squad
Compagny of Heroes II and DLCs
Crysis 2
Dead Space & Dead Space 3
DiRT 3
Divide By Sheep
GRAV
Grim Fandango
I am Bread
Jotun
Left 4 Dead 2
Legend of Grimrock 2
Legends of Eisenwald
Mafia II
Marooners
Medal of Honor
My Time at Portia
Neon Struct
No Time to Explain Remastered
Penarium
Planetary Annihilation
Punch Club Deluxe
Road to Ballhalla
Rust
Samorost 3
Skullgirls + All DLC
Soulcalibur VI
Spec Ops: The Line
Spelunky
Spyro Trilogy
Talos Principle
The Final Station
The Journey Down 1+2
The Ship
Titan Souls
Towerfall Ascension
Tropico 4
Valhalla Hills
Verdun
Void Destroyer
Warhammer Vermintide
X-COM (all the old ones)
XCOM: Enemy Unknown
Yakuza Kiwami
Yakuza 2
Yakuza 3