ECO

You are the last echo of a lost song.

The song that filled the cave broke into notes and fell into the dark. Go down, cave by cave, and gather it back — without being heard.

See with sound

ECO is pitch black. Your only way to see is sonar: every pulse sends rays of sound that bounce off the walls and light up the cave for an instant. Rock blocks it, corners hide things, and everything that lives down here hears it.

• Tap to whisper: you see what's close, almost silently.
• Hold to shout: you see the whole cave… and the whole cave hears you.

Every creature senses something different

• Sleepers hear noise. Stalkers always know where you are, but light freezes them.
• Moths fly to any light. The Blind One feels your footsteps.
• Mimics pretend to be notes. And every five caves, a Guardian sleeps on the exit.

Sneak, throw stones to draw them away, ring crystals to make noise somewhere else, hide in cracks — and listen: you can hear them move before you ever see them.

A song that rebuilds itself

Each note you collect is a real note of the song. The exit sings what you've gathered so far; reach the bottom and you'll hear it whole.

Features

• Ray-traced sonar: sound bounces off real walls and rock hides what's behind it
• 6 creatures, 4 biomes (grotto, underground lake, crystal cavern, the abyss) and cave anomalies
• 12 upgrades ("echoes") to build each run differently
• Unlockable voices (starting styles) with lost echoes you keep between runs
• Daily challenge: the same caves for everyone each day
• Interactive tutorial, in-game guide and a relaxed mode
• Everything — graphics and sound — is generated in code. No image or audio files.

Controls

• Move: WASD / arrows · gamepad stick · drag on touch
• Pulse: Space (tap = whisper, hold = shout) · A · tap / hold still
• Sneak: Shift (hold) · LB / LT · drag a little
• Throw stone: Q · X / RB · stone button
• Pause: Esc / P · Start · II button

Click the game first so it receives your keyboard. Best with headphones.

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En español: eres el último eco de una canción perdida. Baja cueva a cueva a oscuras y recoge sus notas sin que nada te oiga. Solo ves lo que el sonido ilumina: toca para susurrar o mantén para gritar… y toda la cueva te oirá. Lánzales piedras, haz sonar cristales, escóndete en grietas y escucha. El juego está completo en español: Options → Language.