Gamemaster is an online competition environment for General Game Playing. The homepage has links to games, players, metagamers, matches, a leaderboard, and the Gamemaster developers site.

Clicking on the Games link shows a table of games. Clicking on the Information link for a game leads to a brief description of the game in English. Clicking on Standalone allows you to play all roles in that game on a single web page. Clicking on Human allows you to play one role of that game in communication with a game manager. Clicking on Manager allows you to manage a match between players of your choice.

Clicking on the Players link on the home page shows a table of all registered players and a link to start instances of that player in your browser.

Clicking on the Metagamers link on the home page shows a table of all metagamers and links to webpages to use those metagamers.

Clicking on the Matches link shows a table of recent matches. You can filter the results by game or team. Clicking on a match identifier brings up detailed information about the match. And clicking a Review button on this page allows you to replay the associated match.

Clicking on Leaderboard shows the relative performance of all registered players. The drop-down list at the top allows you to select a particular game set or the set of all games. The resulting table shows the performance of each registered player on all games in the selected game set.

Clicking on Developer takes you to the Gamemaster Developer site, where you can develop and publish new games, players, and metagamers. The Developer site is available to all but requires that you create a free, password-protected account.

Clicking on the About link brings you to this page.