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!

Cats in Time: https://www.steamgifts.com/giveaway/J8t85/cats-in-time
Spirit Hunter: Death Mark: https://www.steamgifts.com/giveaway/HlvTF/spirit-hunter-death-mark
Safety First!: https://www.steamgifts.com/giveaway/WDJld/safety-first
Geometric Sniper: https://www.steamgifts.com/giveaway/7EF8t/geometric-sniper
The Town of Light: https://www.steamgifts.com/giveaway/Z8EhB/the-town-of-light