I got this in a bundle of randomly selected keys, as well as several other things, so there are some other giveaways linked below. Enjoy!

PAYDAY 2: https://www.steamgifts.com/giveaway/ddah6/payday-2
Darkstone: https://www.steamgifts.com/giveaway/EBPgd/darkstone
The Wild Eight: https://www.steamgifts.com/giveaway/YMhRE/the-wild-eight
Rebel Galaxy Outlaw: https://www.steamgifts.com/giveaway/9kc34/rebel-galaxy-outlaw