Another lvl 3+ giveaways:

Devade
The Last Photon
SmashZombies
The Morgue Fissure Between Worlds
Barclay: The Marrowdale Murder
28 Waves Later
One Small Fire At A Time
Security Hole
Permute
Featherpunk Prime <------- You are here
Plight of the Zombie
PolyRace
Yrminsul

TAKEN YAY a secret random steam key here: GGJPE-YD(TWO)BX-EEXWL