Knockout

What it is

Knockout is a mixed martial arts (MMA) game by JanKratochvil1, played in the browser. Fights are one-on-one in an octagon: use a preset fighter or build your own, then take on the computer or an online opponent. According to the AI game catalog GamesByAI, most of the game was made with AI; the listing comes from the Vibe Jam 2026 submission form and names Claude Code as the tool. The catalog also lists it as free, with peer-to-peer (P2P) online matches.

Who it's for: Fighting-game fans who want to design their own fighter and step into the cage.

Before you start: The site says you need a keyboard and asks you to play on a desktop. AI Inspiration World didn't sign up or play a match, so the fight flow hasn't been verified. Promo images show a leaderboard; we haven't verified whether results are recorded. Menus are in English, no age rating is given, and no license is stated for the game as a whole.

Based on the game page and the public listing in the AI game catalog GamesByAI. Not tested by AI Inspiration World.