The table near its origin, after the chains have been through. Image: infinidomino.io.
One wooden table, one domino per square, and everyone who is visiting is playing on the same one, live.
The only goal is the chain. Click a standing domino and a glowing arrow shows which way it will fall; it then knocks the next, and the next, without further help. Chains follow the way each domino faces, so a run bends across the table rather than marching in a line. A domino hit from the front is knocked backwards instead.
The table is a real 3D scene you can tilt and rotate (right-drag, Q and E, or a two-finger twist), with a scroll-wheel zoom down to individual dots on the tiles. A counter along the top shows who is online, how many dominoes are falling, how many are currently down, and how many have been toppled all-time.
The part that makes it a game rather than a screensaver is the repair work. Click a fallen domino to stand it back up, including in front of a running chain to keep it alive, or behind one so others can knock it down again. Dominoes still mid-fall cannot be caught. Jump to action flies you to a chain in progress, and the address bar always holds your position, so a link shares the exact spot. You can also type coordinates; the help text’s example is 1000000, -42.
It was made by the Hacker News user Static2280, who posted it as a Show HN on 18 October 2026. Their stated reason: they had built a multiplayer word search called InfiniWord, were thinking of other “infinite” games to make, and “thought of how fun it is to watch dominoes fall over.” The title says “practically infinite,” and the maker does not claim more.
Some limits. It needs a current browser (the site names Safari 16.4 or newer, or a current Chrome, Edge or Firefox) and shows an apology screen otherwise. It is only as lively as the crowd: near the origin the table is already mostly flat, and a lone standing domino has nothing to knock. Sound is off on iPhones in Silent mode. There was no sign-in or price anywhere. Whether it is open source is unanswered; a commenter asked on Hacker News, and the thread has no reply from the maker.