Play Agar.io Online
Real-time cell-eating arena up to 10 players.
Agar.io on Stario is the classic cell-eating arcade played as a 3-, 5-, or 10-player free-for-all in your browser. Eat smaller cells to grow, dodge bigger cells to survive, and end the round as the largest mass on the map. Top finishers climb the leaderboard, with competitive ranked matches tuned per tier.
Agar.io basics
You start as a small cell on a top-down map. Move with your finger or mouse — the cell follows your cursor. Eat the small food pellets scattered around the map to grow slowly. Eat other players' cells (you must be ~25% larger to consume them) to grow fast. Avoid larger cells; if they touch you, you lose.
Viruses (the green spiked dots) split bigger cells into pieces — dangerous if you're large, useful as a defensive cover when small. The match runs on a fixed timer; whoever has the highest mass at the buzzer wins the round and takes the top spot.
Agar.io on Stario
Stario's Agar.io is server-authoritative — collision detection, food spawning, and cell merging all happen on the backend, so client-side cheats don't work. Bots fill empty seats so 10-player tables always populate. Competitive tiers run from Casual through Elite; rankings reward roughly the top three finishers in larger tables.
Tips for survival
- Stay near the edge early. Center of the map has more food but also more predators.
- Use viruses as cover when you're small — bigger cells can't enter without splitting.
- Eject mass to lure prey into a chase, then snap back the way you came.
Agar.io on Stario FAQ
How long is a match?
Default match length is 3 minutes (180 seconds). Configurable per competitive tier in admin config.
How are rankings decided?
Top three finishers earn the most, weighted toward first place. Exact weighting varies by player count and tier — first place leads in 10-player tables.