Game rules: You start with 6 cards and a small amount of resources. You can move cards up (for play it) or down (for discard). Unless card has the text "play again" each move ends your turn. At the start of each turn you have more resources (white text). Goal is to destroy the enemy tower or build your tower to 100.
Key points: 1 Multiplayer! Yes you can play with your friends or other players around the world! 2 More than 200 different cards! 3 Lost of offline bots - so you can enjoy the game even when you are offline. 4 Fully free!