In celebration of Green Man Gaming's 6th birthday, you can grab a random game for 6 cents. The game will either be on Steam, Uplay, Origin, or GOG. Some people have already gotten codes for Euro Truck Simulator and Call of Duty: Black Ops so if you're looking for a bargain this is a good chance to get one. Don't expect to get anything amazing, but hey, it's basically free.
UPDATE: The mystery games are sold out, I'll put this back up on the portal if they come back.
Snatch one here