Fighting · Action · made with Claude
Knockout
Pick or create an MMA fighter and battle in the octagon online or solo.
About Knockout
Pick a ready-made fighter or build your own, then step into the octagon: Knockout is a free MMA fighting game that runs in the browser. You trade strikes with your opponent until one of you is beaten.
The creator describes the goal as a fun, approachable MMA game, and also an experiment to see whether one could be made by vibe coding. The experiment ran on Claude Code, and the game ranked 228th of 945 entries at Vibe Jam 2026.
Bouts are one-on-one: you can fight the computer solo or take a bout online against another person, where peer-to-peer multiplayer connects two players directly. Building your own fighter adds a personal touch before each match, and the whole thing aims to be easy to pick up.
How it was made
Most of the code was written by AI. Source: Vibe Jam 2026 submission form.
Evidence: the creator's own account.
- AI provider
Anthropic- AI tools
- Claude Code
- Players
- Online multiplayer
Questions about Knockout
Is Knockout free to play?
Yes. Knockout runs in your web browser at no cost, with no download or account needed.
Which AI was used to make Knockout?
Knockout was made with Claude Code and Claude. Most of the code was written by AI, according to the Vibe Jam 2026 submission form.
Can I play Knockout on my phone?
Knockout is built for desktop browsers. It may not work well on a phone.
Who made Knockout?
Knockout was made by JanKratochvil1. See their profile on GamesByAI for their other games.
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