Rooster Teeth had ninja launch their latest mobile game, RWBY Deckbuilding Game on Steam and the Google Play Store. The iOS version should be available pretty soon too.
RWBY Deckbuilding Game is a new breed of digital card game where you build your deck to defeat an array of deadly foes, or join forces in raids to take down powerful villains. Players get to nattle with Ruby, Weiss, Blake, Yang, Jaune, Nora, Pyrrha, or Ren as you upgrade your deck for victory.
The special thing about the game is that there are no booster packs to buy. All the cards can be unlocked by playing the game.