Some of this keys are fairly old but, to my knowledge, they should work. Let me know if you want any of this and I'll send you a HumbleBundle gift link, so you can see it's legit (in those cases that it let me). Cheers!
(In no order in particular)
- Borderlands: Game of the Year Edition
- World of Goo
- Doodle God
- Bastion
- A Virus Named Tom
- Beat Hazard Ultra
- VVVVVV
- Frozen Synapse
- Chroma Squad
- Guacamelee! Gold Edition
- Hero Academy
- Super Hexagon
- FEZ
- Superbrothers: Sword & Sworcery EP
- LIMBO
- Tower of Guns