# Agar.io

> A browser game shared once on 4chan was the No. 1 iOS game by downloads in July 2015.

- Owner: Matheus Valadares (creator); Miniclip (publisher)
- Kind: Game
- Sector: Gaming
- Seed date: 2015-04-28
- Peak date: Jul 2015
- Date basis: Dates use the stated precision; chart positions are date anchors.
- Spread Score: 62 (Viral), v1.2
- Mechanics: Platform jump, Press loop, Dupe economy

## Summary

Matheus Valadares released Agar.io on April 28, 2015, and said he shared it once on 4chan. YouTube and Twitch players picked it up in May. Miniclip launched it on mobile on July 7, and it led worldwide iOS game downloads that month.

## Timeline

- 2015-04-28 — Matheus Valadares (Open web) — Valadares released Agar.io on the agar.io domain.
- 2015-04-28 — Brega on r/WebGames (Reddit) — Reddit user Brega shared a direct link to Agar.io in r/WebGames.
- 2015-04-30 — Boing Boing (Rob Beschizza) (Press) — Boing Boing called Agar.io a horribly addictive browser game.

The full timeline, metrics and sources are on the case page, or via the Pro API (https://howitspread.com/developers).

Canonical URL: https://howitspread.com/cases/agar-io

Cite as: How It Spread (2026). “Agar.io.” Case HIS-00420. Spread Score v1.2: 62/100. Updated 2026-10-17. https://howitspread.com/id/HIS-00420