Far Cry 3 Blood Dragon had Steam trading card support added on 8 October 2013. There are 6 cards in the series, and you'll receive 3 cards at random for purchasing and playing the game.
Other games in the series, Far Cry Primal and Far Cry 5 also have trading card support.
Trading Cards
Foil Cards
Badges
Booster Pack
Emoticons
Profile Backgrounds