ECHO

Find your way through the dark using sound alone.

ECHO is a minimalist stealth-puzzle game where you play as a blind cave explorer lost deep underground. The screen starts completely black. Your only way to “see” is to send out a sonar pulse that briefly reveals the world around you in a rippling circle of light, then it fades back into darkness.

Each level is about balancing caution and instinct. Your pings are limited, enemies can hear you, and the deeper you go, the more you have to rely on memory, timing, and gut feeling to survive.

Features

• Explore caves in total darkness using sonar-based vision
• Solve tense stealth-puzzle levels with a limited ping supply
• Avoid enemies that react to the sound of your pulses
• Learn and navigate layouts through memory and movement
• Minimalist visuals with a strong focus on atmosphere and audio
• Built with HTML, CSS, and JavaScript
• Made with CODEX, wanted to see what it could do