Steam Trading Cards have been added to the game. The set features 8 cards, 3 backgrounds, and 5 emoticons. We hope you enjoy them. Thanks to everyone who has supported the game.
Examples:
Parvaneh: Legacy of the Light's Guardians update for May 31, 2017
Steam Trading Cards are now available
View all patches · Build 1201861 · Last edited March 15, 2019 – 18:49:02 UTC by 
Wendy
Patchnotes via 
Steam Community