The Game That Started the .io Era
Agar.io was created by then-19-year-old Brazilian developer Matheus Valadares (known online as Zeach) and released on April 28, 2015, after he first shared a link on 4chan's /v/ board for playtesting. Without any marketing, word spread through social networks and the game became one of the fastest-growing browser titles of its year — it was Googled more than Fallout 4 during parts of 2015. Miniclip partnered with Valadares shortly after launch and the game expanded to mobile.
How to Play
Move your circular cell with the mouse. Eat smaller cells (colored pellets and smaller players) to gain mass. Avoid larger player cells — they can absorb you. Press Space to split your cell into two, launching half of your mass forward to catch prey or escape threats. Press W to eject a small amount of mass, useful for feeding teammates in team modes or baiting opponents near viruses.
Key Tactics
- Stay near the edges of the map when small — less exposure to large predators.
- Use viruses (spiked green cells) as shields; large cells that touch them will split apart.
- Split aggressively to catch fleeing prey when you have a significant size advantage.
- After splitting, regroup quickly — a fragmented cell is vulnerable from multiple directions.
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