Sights like these are common in Agar.io, a multiplayer browser game where player-controlled circles gobble dots, increase mass, and feast on each other. Agario is pretty simply to grasp.

Agar.io or Agario is a game in which you take charge of a tiny cell, eating small dots and other players that are smaller than you. Every time you eat a dot or another player you grow in size ...

An unlikely internet sensation when it launched in 2015, Agar.io spawned an entire genre of spinoff “-io” games with trademark low-res graphics and free, free-for-all gameplay. Nowadays ...

I started playing an online game called agar.io a few weeks ago, and by now it’s swallowing up almost all my leisure time. I’ve stopped reading, watching movies — it’s weird! I probably ...

On the fourth season of House of Cards, which went up on Netflix last Friday, embattled president Frank Underwood spends some valuable campaign time with the online multiplayer game Agar.io.