Abyssal Trench

Abyssal Trench is a deep-sea ecosystem keeper set around a hydrothermal vent. Three colonies depend on you and on each other: tube worms fix sulfur into energy, mussels filter the cloudy water, and shrimp clean away debris. If one colony crashes, the whole web unravels.

Drop mineral nutrients to feed every colony, and ride the temperature valve as vent heat and sudden cold seeps push the water out of the comfort band. Raise prosperity to the goal and hold it steady across cycles to clear each dive.

Six dive sites ramp up the pressure: chilling cold seeps, hungry crab swarms you must tap away, and rival vents that steal your minerals. Earn coins every cycle and spend them in the supply depot on richer minerals, thermal insulation, a crab whistle, pioneer colonies and golden symbiosis.

Features:
- Living ecosystem simulation with three interdependent colonies
- Simple one-hand controls: minerals, heat valve, cold vent
- Six progressive levels with events and rival vents
- Coin economy and a five-item upgrade shop
- Custom synthesized sound effects, no downloads needed
- Progress, coins and gear saved automatically