Best MMO Games 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!

Key Agar.io features:

Simple and Addictive Gameplay Multiplayer Experience Free to Play Cross-Platform Availability

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.

Key Slither.io features:

Simple and Engaging Gameplay Multiplayer Experience No Download Required Aesthetic Appeal

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.

Key Diep.io features:

Engaging Gameplay Multiplayer Interaction Free to Play Browser-Based

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

Key Mope.io features:

Educational Value Simple Controls Social Interaction Frequent Updates

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

Key Osmos features:

Innovative Gameplay Aesthetics Physics-Based Mechanics Multiple Game Modes

Clash of Clans is a mobile strategy game set in a comically cartoon world of medieval siege warfare.

Key Clash of Clans features:

Engaging Gameplay Community Interaction Regular Updates Free to Play

Experience and explore the games and other upcoming updates from Gameloft®. Find the game that will best fit your lifestyle!

Key Order and Chaos Online features:

Vast Open World High Player Customization Rich Multiplayer Experience Frequent Updates

Eat cells or die trying!

Key Mitos.is features:

User-Friendly Interface Multiplayer Experience Variety of Game Modes Free to Play

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.

Key florr.io features:

User Interface Feature Set Collaboration Tools Customization

Deck Heroes: Legacy is an Amazing, Free-to-play, Action-Adventure, Strategy, MMORPG, and Combat video game developed and published by IGG.

Key Deck Heroes: Legacy features:

Engaging Gameplay Diverse Card Collection Vibrant Visuals Regular Updates

Battle Dragons is a spectacular 3D, Action, Mobile Strategy, Tower-defense, Collectible Cards, and Fantasy-based video game developed and published by Spacetime Games.

Key Battle Dragons features:

Engaging Gameplay Stunning Graphics Community Interaction Regular Updates

Battle Glory is a Fantastic, Action, Mobile Strategy, Real-time Combat, Tower-defense, and Fantasy-based video game created and published by MG Studio LLC.

Key Battle Glory features:

Engaging Gameplay Multiplayer Interaction Regular Updates Free-to-Play

Neopets is an Amazing, Virtual World, Massively Multiplayer Online, Role-playing and Fantasy-based video game developed and published by Viacom.

Key Neopets features:

Nostalgia Community Variety of Games Creativity