Best MMO Game Products in 2025

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!

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.

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.

Slope Game is a popular online game that has sparked a lot of conversation among players of all ages.

Open Source

Start as a mouse, eat other players and climb the food chain in this Agar.io alternative.

There are EELY's out there in the ocean, to challenge you and to stop you in the way.

defly.io play this awesome game Fly a helicopter and shoot at enemies during tense and epic duels!

Fight other flowers for garden dominance. Florr.io is a web game produced by M28. In florr.io, you play in a rectangular map and control a flower that must travel to the right as you gain XP and collect stronger petals.

Tunnel Rush is a running game with its core gameplay mechanics. You are challenged to run at an incredible speed in a rotatable tunnel while evading hazards.

Vanar.io is a simple real-time multiplayer browser game.

Warcell is a realtime multiplayer dot eating game for Android.

Worm.

Senpa.io is a massively multiplayer online action game created by the developers of Agar.io