Agar.io is a massively multiplayer online game where players control a cell and try to grow by eating.   

You move around a large map filled with smaller pellets and other players competing for survival space.  

The goal is to become the biggest cell by consuming others while avoiding larger enemies that chase you. 

Strategy and timing matter as you can split, merge or eject mass to escape, attack or protect yourself.  

Each match feels different with unpredictable movement and shifting alliances among nearby opponents.    

You can customize your skin, name and play style while climbing the global leaderboard in real time.    

The gameplay is simple to learn but mastering movement, control and tactics takes skill and patience.   

Agar.io remains a timeless example of fun, competitive and chaotic multiplayer arcade gameplay online.