Drowning is a game where you shoot torpedoes at sonar blips.

The arrow keys move the camera.

Use the sonar to determine where enemies are coming from and the scroll wheel on your mouse to adjust the angle torpedoes will be fired at. Close counts in horseshoes, hand grenades, and 3,000 lb torpedoes. There's no need to aim too carefully.

Keep killing enemies until you can make your escape into hyperspace: pull the lever once the engine is at full power.