Agar.io - The smash hit game! Control your cell and eat other players to grow larger! Play with millions of players around the world and try to become the biggest cell of all!

Worm.is - Worm.

Slither.io - Slither.io is a multiplayer online video game. Players control an avatar resembling a worm, which consumes multicolored pellets, both from other players and ones that naturally spawn on the map in the game, to grow in size.

Curve Fever - Curve Fever is a Free to play Multiplayer Strategy video game in which the player spawns as a dot at a random spot on the playing field and move at the constant speed.

Osmos - The full game includes 47 levels (plus "infinite" bonus content) across 8 distinct level...

Diep.io - 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.