Action · Arcade · .io · made with GPT
SumoBall.io
Bump rival sumo balls off the arena to be the last one standing.
About SumoBall.io
SumoBall.io is a shoving match between balls, played online. You control a sumo ball in a multiplayer arena and try to knock every other player off the platform, and the last ball still on it wins.
The creator took the idea from the sumo minigame in Fusion Frenzy and the bumper balls in Mario Party, then built the rest by feel. They made it with Codex, with Three.js rendering the 3D arena, and it ended up 371st of 945 in Vibe Jam 2026.
Everything is set up for quick multiplayer rounds, which is where the project started. Rounds are fast, matches end quickly, and players can drop in or out, on a phone as well as in a desktop browser, so little stands between you and the next bump.
How it was made
Most of the code was written by AI. Source: Vibe Jam 2026 submission form.
Evidence: the creator's own account.
Screenshots
Questions about SumoBall.io
Is SumoBall.io free to play?
Yes. SumoBall.io runs in your web browser at no cost, with no download or account needed.
Which AI was used to make SumoBall.io?
SumoBall.io was made with Codex and GPT. Most of the code was written by AI, according to the Vibe Jam 2026 submission form.
Can I play SumoBall.io on my phone?
Yes. SumoBall.io supports mobile browsers.
Who made SumoBall.io?
SumoBall.io was made by netpro2k. See their profile on GamesByAI for their other games.
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