"Metal Waltz" a card-like mobile game developed by the "what's up game labs" team. This is to make a variety of tanks anthropomorphic into "Metal Maiden", to compile, bred, and strengthen them, the goal is to become a simulation game of the invincible joint tank team, the game has a Metal Maiden that can develop their favorite country The nurturing elements, or collecting collection elements with more than 300 Metal Maiden, teaming up with other players, as well as colorful gameplays such as tanks.