Plot: Surviv.io is a browser based multiplayer online 2D battle royale game created by Justin Kim and Nick Clark. It was released in October 2017 for browser, and in October and November 2018 respectively for iOS and Android devices. Wikipedia
Plot: Diep.io is a multiplayer action game available for web browsers, Android, and iOS, created by Brazilian developer Matheus Valadares. Players control tanks and earn points by destroying shapes and killing other players in a 2D arena. The mobile version of the game was released in 2016 by Miniclip. Wikipedia...
Plot: ZombsRoyale.io is a 2D battle royale video game developed by an American studio, End Game. It was released on 2018 for iOS, Android and on web browsers. Wikipedia
Plot: Agar.io is a massively multiplayer online action game created by Brazilian developer Matheus Valadares. Players control one or more circular cells in a map representing a Petri dish. Wikipedia