Battleborn was a supported title that has since been removed from the Steam Store.
Battleborn had Steam trading card support added on 9 May 2016. There are 9 cards in the series, and you'll receive 5 cards at random for purchasing and playing the game.
As of November 2019 [1], the game has been delisted from Steam as 2K began the process of shutting the game's servers down. As such, its trading cards and crafting rewards can no longer be bought or sold on the Steam Community Market. However, the ability to trade them remains available.
Trading Cards
Foil Cards
Badges
Booster Pack
Emoticons
Profile Backgrounds