Game guide
Candidates: 2–500
Marble Battle builds a tournament from the entered names. Choose a match-size setting from 2 to 8, then start the tournament. Marbles compete in an arena; survivors advance until a champion remains. The bracket shows the route through the rounds.
The setup accepts up to 500 distinct names. Empty entries and repeated names, ignoring letter case, are removed. For a round with eight or fewer remaining candidates, everyone enters one match. Larger rounds are grouped around your selected size; groups are adjusted to avoid a one-person match, so an individual match can differ from the chosen size.

Before you start
Review the candidate list before starting. Each game has its own capacity; a large saved preset may contain more names than this game accepts.
Results and fairness
These are entertainment simulations. Outcomes are not certified equal-probability draws or audited selections. Agree on the meaning of a result before playing.
Names, images and privacy
The candidate editor stores names and custom images in this browser. Clear the list or browser site data to remove them. A shared or downloaded clip can reveal the names and images shown on screen.
Technical help
Use a current browser with JavaScript and canvas support. If a game is slow, reduce the candidate count. Recording support varies by browser; downloaded clips currently contain video only.