KO Jumper / Knockout Jumper: Brawl Royale

You've got ten minutes, a browser tab, and maybe a friend who's up for something silly. A game you can start without installing anything or making an account fits that gap nicely.

KO Jumper puts three or four fighters on a giant LED floor with no walls. You shove, hit and block until everyone else has gone over the edge. In a browser it's WASD to move, the mouse to look and a click to hit. Phones get touch controls, and Xbox, PlayStation and Switch Pro controllers work too.

Quick match drops you into an online game, and the App Store listing says empty places fill with bots after a few seconds. A new multiplayer game rarely has a crowd waiting, so that's a sensible fix, and every bot carries a BOT label so you know who's real. For friends, you make a private room and share a four-letter code. Practice mode has Easy, Medium and Hard bots, and there's a daily challenge plus daily missions.

The game runs at kojumper.com with nothing to install. The iPhone app is listed as Knockout Jumper: Brawl Royale, and app players and browser players meet in the same matches, so a room code works for both. The app is rated 13+ for cartoon violence and needs iOS 26 or later, which rules out older phones. The browser version is the fallback for those.

There's no account and nothing to buy. KO Points and unlocked characters are kept on your device, in the browser you played in, so clearing the site's data removes them, and the iPhone app keeps its own. Points are earned by playing and can't be bought. The roster has 131 characters, 36 of them free from the start.

The privacy page, last changed November 2, 2026, says there are no ads. An online match sends a random guest ID, your moves, your character and your IP address, which the game uses to limit connections and doesn't store. It counts events such as matches and errors as anonymous daily totals, and the website uses Cloudflare Web Analytics without cookies. There are no typed names and no chat.

Kirouff Games runs the game, and the App Store seller is Josh Kirouff. If you like quick, scrappy matches, grab a friend and a room code and give it a round.