21 Monsters® merges an exciting battle game with Blackjack using Gamiker's patent pending "Action Card" system. 

Using the suits and numbers of cards to power the actions of an array of tanks and war machinery, Players must defend their city from invading monsters, sometimes by collaborating with other players**.

Successfully defending a city will unlock new levels, monsters, and up-gradable tanks-- adding enticing achievements and a sense of progression to the game of Blackjack.    

**Depending on game mode and deployment set-up.