Monster Strike

is a mobile physics game with elements of RPGs, strategy games and cooperative multiplayer. It is developed by Mixi for the iOS and Android platforms. The game was co-created by Yoshiki Okamoto. In Japan, its name is often shortened to MonSt (モンスト). By June 30, 2015, the game had daily revenues of $4.2 million, grossing more than $1 billion in 2015. The game subsequently grossed $1.3 billion in 2016, and another $1.3 billion in 2017. A more traditional RPG of Monster Strike was released for the Nintendo 3DS in December 2015.

The game can be summed up as a cross between Nintendo's Pokémon and Capcom's Metal Walker; the former in that it centers around monster collecting and the latter in that battles take place using catapult mechanics.

The game was adapted into an anime series in 2015. An anime film adaptation titled Monster Strike The Movie was released on December 10, 2016. A second anime film, titled Monster Strike The Movie: Sora no Kanata, is currently in the works.