Every .io arena worth your next five minutes
There are thousands of .io clones and a few hundred genuinely good ones. We keep track of which is which.
Welcome to FastFun
FastFun is an independent directory for free browser multiplayer games — the genre Agar.io and Slither.io started and that now spans battle royale, shooting, tank, blob, snake, survival, building, and racing arenas. Everything here runs in a browser tab: no launcher, no account, no install.
Our mission
Get you into a good match in under ten seconds. We favour honest descriptions, useful categories, pages that load fast on a school or office connection, and direct credit to the people who built each game.
Curated arenas
Hundreds of .io games sorted into categories that actually mean something.
Instant play
Click a tile, load the arena, play. No download, no launcher, no sign-up.
Private favorites
Saved locally in your browser and controlled by you.
Developer friendly
Original creators stay credited and keep the play traffic.
For game developers
Built an .io game? We would love to play it. Use the game submission flow or contact us with the game URL and a short description.
Our values
- Quality: games we have actually played, not an unfiltered link dump.
- Speed: a fast interface that gets out of the way before the match starts.
- Respect: credit for creators and minimal collection of player data.
- Curiosity: room for weird indie arenas, not just the top ten clones.