12 Labours of Hercules IV: Mother Nature was released on Steam with trading card support on 25 December 2015. There are 7 cards in the series, and you'll receive 4 cards at random for purchasing and playing the game.
The other installments in the game series, 12 Labours of Hercules, 12 Labours of Hercules II: The Cretan Bull and 12 Labours of Hercules III: Girl Power, also have trading card support.