Kanono.io is a free-to-play online MMO game developed by an anonymous discord user. The game is a spinoff of another popular game, diep.io. Kanono has not been released yet.
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.
Moomoo.io is an online team-survival game developed in 2017.