Echo Trench

DESCEND. LISTEN. SURVIVE. Echo Trench is a system-driven abyssal expedition game built around a dangerous idea: sonar reveals the world, but the world hears you back. Pilot a compact bathyscaphe through nine distinct deep-sea regions and 23 authored missions. Balance hull integrity, power, oxygen, cargo mass and acoustic threat while deciding when to scan, fight, recover salvage, take an optional route or turn back for extraction. BUILD FOR THE DIVE Choose among five specialized module directions. Manipulate enemy perception with Silent Array, withstand extreme pressure with Reinforced Hull, control cargo and threats with Salvage Rig, chain environmental resonance with Resonance Tuner, or convert hostile currents into speed and power with Current Drive. Sidegrades and fabrication change interactions rather than simply stacking damage. A WORLD THAT REACTS Hydrothermal vents, pressure fractures, crystal fields, echo mirrors, tidal shear, sonic blooms and void gates interact with sonar, shock, enemies and your build. Dynamic events and challenge modifiers remix those systems without replacing authored mission structure. HUNTED BY THE DEEP Face predators, swarms, siphon units, ranged controllers, support enemies, cargo thieves, environment manipulators and elite variants. Five major bosses use their arenas as part of the fight and demand different combinations of positioning, resources, sonar timing and environmental control. KEEP DESCENDING Complete the campaign, uncover secret routes, improve modules, craft tactical sidegrades and enter challenge tiers that combine modifiers, events and seeded encounters for replayable mastery. Core gameplay and local progression are designed to work without a network connection. Optional Unity Ads may appear as a Home banner or an optional rewarded video after a successful result; watching ads is never required for normal progression.