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Physics sumo. Push the other balls off the platform. Thousands of player-made maps and a proper level editor. 2016, Chaz.
Bonk.io is a free arcade, physics and puzzle io game (physics, custom-maps, party). Games that do not fit the other boxes. Sumo physics, curve-fever trails, competitive Tetris. It ran when last checked, on 2026-09-16.
The game loads from bonk.io in a frame. Its own terms, privacy policy, ads and accounts apply inside it, and a save made here is separate from one on bonk.io. If you already have progress there, open the game on its own site. How the frames work.