Your research vessel, the Nautilus II, was dragged beneath the waves of the ocean world
Thalassa-9. You woke in a sinking escape pod. A signal is pulsing from far below — repeating
your own voice back to you. Explore a vast trench of sunken ships and crashed alien craft, build a
submersible, and descend toward the Choir. The deeper and darker it gets, the less you are alone down there.
Use headphones.
An original deep-sea survival game inspired by the genre — not affiliated with Subnautica or Unknown Worlds.
Plays in your browser, including iPad Safari. Co-op is peer-to-peer (share the code with a friend). Touch: left stick swim · right stick look · RISE/DIVE · hold ⊙ interact · USE/TOOL · LIGHT · ◉ GHOST (Phantom) · ♪ sound. Desktop: WASD · mouse look · Space rise · C dive · Shift sprint · E interact · 1–4 tools · R use · V exit vehicle · P phantom · F light · M mute. Vehicles: MINNOW (fast scout) · BATHYS suit (pressure-rated) · TITAN HAULER (armoured cargo) · Phantom Drive (ghost projection) — build at a Fabricator. TITAN: G fires deterrent charge.