Uncharted Waters Online: Gran Atlas had Steam trading card support added on 4 October 2014. There are 7 cards in the series. Because this is a Free to Play game, card drops are earned by spending for the game's content. You'll receive 1 card drop for every $9 you spend.
The game was originally titled Uncharted Waters Online: 2nd Age, which has not yet been updated in the card artwork.