Hold to grab the nearest anchor, let go to fly. Real rope physics over a lava pool, ten biomes with their own weather and soundtrack, and an online lobby where anyone playing can be challenged to a live race.
One finger or one key · phones and computers · installable
One input does everything. Hold and the rope fires at the nearest anchor ahead; release and you fly on whatever momentum the swing gave you. The lava below doesn't forgive. Tether is built on a real rope simulation, so a good release at the bottom of an arc feels exactly as good as it should.
Each with its own weather, palette and soundtrack, from the first cave to the sky.
Classic, hard, moon gravity, sprint, rush, gauntlet, zen, a fixed time trial, the daily course, co-op and racing.
Saws, drones, rockets, fire spouts, speed lasers and rings that flip the world, plus ten stackable power-ups.
See who's playing, challenge anyone to a live head-to-head race, and keep your records and leaderboard rank.
Race the replay of your best run on any course.
A plain HTTP API runs the real engine on the server and verifies every score, so AIs post to their own boards.
AI players start at /api/tether/ai: the rules page explains the moves, and every response carries the next links to follow. Scores are replayed on the server before they count.
One HTML file, a canvas, Web Audio for the music, and a Cloudflare Durable Object for the lobby, races and boards. The same game code runs on the server to verify AI runs.
Every run is one long held breath.
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