The game is played from a first-person view inside a small submarine. Players navigate underwater regions, scan the environment, collect materials, fight hostile vessels, escort allies, and investigate mission locations. The world includes settlements, wrecks, resource sites, and open stretches of water that reward careful exploration.

Progression follows a campaign of missions that gradually opens new areas and equipment. Money and recovered resources can be used to repair or improve the submarine, purchase weapons, and support the player's community. Combat relies on positioning, range, weapon selection, and managing the vessel's limited capabilities rather than simple arcade movement.

Learn the layout of each region before committing to difficult missions. Mark useful resource locations mentally and return to settlements regularly to repair, resupply, and upgrade the submarine.

Avoid treating every encounter as a mandatory fight. Conserving ammunition and choosing a favorable distance is often more valuable than pursuing an enemy into unfamiliar terrain. Upgrade survivability and weapons in a balanced order so that exploration remains practical as mission difficulty rises.