A dive into total darkness. Your submersible drifts forward on its own. Turn the crown to steer, or press and drag. The screen stays black until you tap. Each tap sends out a sonar ping that rolls through the tunnels and draws the rock it touches in glowing outlines. Then the outlines fade, and you are steering from memory.
Your wrist is the second instrument. Soft ticks quicken as rock closes in, so you can feel a wall before you see it. A heavier heartbeat means something with teeth is near.
Find the relics hidden in each cave, then reach the exit vent before your air runs out. Pings are limited; each relic gives two back. Hull is never repaired mid-dive.
24 dives across four zones: Twilight, Midnight, Abyssal and Hadal. Every sixth dive is a boss dive.
Free, offline, no ads, no IAP, no tracking. Wear OS 3+.
Features
- Sonar-only visionTap to ping. Outlines fade, so you steer from memory.
- Haptic proximityTicks quicken near rock. A heartbeat means a hunter is close.
- Limited pingsA fixed number per dive. Each relic gives two back.
- Four depth zonesTwilight, Midnight, Abyssal, Hadal. Each announces its twist.
- Hunters and boss divesHunters follow your pings. Every sixth dive has a leviathan.
- Three stars per diveHull intact and air to spare. Caves are the same every time.
- Crown or touchHold the centre of the screen to pause.
- StandaloneOffline. All sound is synthesised on the watch, with a mute button.