Echo Abyss

The ocean gets darker the deeper you go. Your sonar is the only way to see. Steer your submarine down an endless underwater cave, send sonar pings that sweep the rock walls in light, and collect pearls, gems and sunken chests while your oxygen ticks away. Every zone is darker, richer and more dangerous: jellyfish, spiny urchins, old naval mines, eels, boiling vents and anglerfish that hunt anything that makes noise. Spend your salvage in the Hangar on 9 upgrades (hull, oxygen, thrusters, sonar, floodlight, magnet, jet boost, Shock Pulse, salvage rights), complete missions, unlock deeper launch points and beat your depth record.

The game is an underwater exploration and survival game that combines submarine navigation, resource collection, and upgrade progression with challenging obstacles in dark underwater caves.

Pilot your submarine through an endless underwater cave and use sonar pings to reveal the surrounding rock walls. Collect pearls, gems, and sunken chests while avoiding dangerous sea creatures and obstacles. Keep an eye on your oxygen supply as you explore deeper.

The main goal is to explore as deep as possible, collect valuable salvage, complete missions, and beat your personal depth record while surviving the dangers lurking underwater.

Yes! You can spend collected salvage in the Hangar to unlock and improve nine different upgrades, including your hull, oxygen, thrusters, sonar, floodlight, magnet, jet boost, Shock Pulse, and salvage rights. You can also unlock deeper launch points as you progress.

Yes! Each underwater zone becomes darker, more rewarding, and more dangerous. You will encounter jellyfish, spiny urchins, naval mines, eels, boiling vents, and sound-hunting anglerfish, making every deeper dive more challenging.