/free-dive · Sep 26, 2026
Free Dive
One input: hold Space to breathe out and sink, let go to rise. A letter written in the dark, 760 metres down — keep each line by surfacing awake.
A free-diving world where **holding one key is the only control**. Hold Space (or hold the screen) to breathe out and sink. Let go to float back up.
Every new depth lights a line of a letter in the water — but it only counts if you surface conscious. Push too far and you black out; your safety diver brings you up and the line slips away. Each new best stretches your lungs a little further, from the sunlit reef through the kelp, the jellies of the twilight zone and the midnight glow, down to a whale fall on the sea floor.
Built for One Input Worlds on PlaiGround.
[Dive →](/free-dive/play/)
Three.js, all sound synthesised in Web Audio: breath, bubbles, heartbeat, pressure hum and distant whale calls. Best with headphones.