Horizon Deep vs Below The Layer

You wake cold on a research station at the bottom of the sea. The lights are failing, the air is thin, and something in the dark below is singing — three notes, patient as the tide. HORIZON DEEP is a slow-burn deep-sea idle RPG about bringing a drowned station back to life and diving the black water it hangs in. It starts as one instrument on an empty screen and quietly opens into a whole abyss. RECLAIM THE STATION Pump out flooded compartments one by one, install fabricators and galleys and gardens, and wake a crew of named survivors — each with a knack — to run it. The station is a sealed pressure vessel you have to *keep*: the sea keeps trying to get back in. DIVE THE DARK Trace the seafloor on a live sonar scope with your finger — a floaty, drifting swim through currents, wrecks, scalding vents, and roaming predators you can read on the scope and route around, or turn and fight. Your air is your range: every stroke is a breath, and the only thing that comes home is what you carry back through the lock. FOLLOW THE SIGNAL Recover strange relics and study them at the survey lab to unlock what the deep knows. Crawl the flooded interiors of derelict hulks. Chart named places on the shelf. Piece together why the three notes never stop — and choose how to answer them.

Take command of a submarine in a tactical simulation where every decision matters. Read the ocean, interpret uncertain contacts, exploit the thermal layer, and decide when to evade or strike. No ads. No in-app purchases. No subscriptions. The complete game is yours from the moment you dive. Listen through passive sonar, classify contacts, and maneuver to turn uncertain bearings into a firing solution. Close the range, prepare your tubes, and decide whether the shot is worth revealing your position. Every choice has a cost. Speed helps you intercept, but it raises self-noise. The thermal layer may hide you—or conceal the enemy. A periscope observation can tighten a solution, but an exposed mast can betray you. Every torpedo launch leaves a datum that escorts, helicopters, and hostile submarines may investigate. FEATURES - Read faint contacts on a scrolling broadband waterfall, then dissect their signatures in narrowband - Build honest target-motion solutions from bearing rate, geometry, and your own maneuvers—not omniscient map markers - Risk raising the periscope to sweep the horizon, estimate range, and judge angle on the bow - Operate a working torpedo room: power, program, flood, open, fire, secure, and reload four independent tubes - Keep launched weapons on the guidance wire until their active seekers take over - Carry out changing patrol orders involving interception, reconnaissance, navigation, identification, and weapons-tight restrictions - Outsmart escorts, ASW helicopters, and hostile submarines that search for where they think you are - Exploit depth, silence, thermal layers, bottom terrain, maneuver, and decoys to break the enemy’s picture - Cross long patrol distances under time compression that yields when danger arrives - Face reproducible seeded patrols where imperfect information makes every decision matter Your crew handles routine classification and procedure. You decide where to listen, which contact to track, when to expose the boat, when to fire, and when to break contact and return home. Below the Layer rewards patience, geometry, stealth, and judgment—not reflex shooting.