Sonar Deep

Sonar Deep is a dark underwater survival game where you pilot a small submarine through a pitch-black trench. The path ahead is hidden, and danger can appear at any moment. Use sonar waves to briefly reveal cave walls, mines, treasures, energy cells, and safe routes. Sonar energy is limited, so every ping matters. Drag to guide the submarine, dodge hazards, collect treasure, recharge energy, and push deeper into the abyss for a higher score.

Choose from three survival routes: Shallow Patrol, Midnight Trench, and Abyss Run. Each route changes the speed, mine density, hull durability, and sonar recharge rate. The deeper you go, the harder the trench becomes. Sonar Deep is fully offline, lightweight, and designed for quick, replay-able mobile sessions.

Key Features
- Dark underwater survival gameplay with a unique sonar reveal mechanic.
- Hidden mines, treasure, energy cells, and moving cave pressure.
- Three survival routes with increasing speed and danger.
- Local best score, best depth, selected difficulty, and achievement progress.
- Pause, resume, retry, result summary, sound toggle, and vibration toggle.
- Offline-first experience with no login, no backend, no ads, and no analytics.