Take your arch deep under the sea to explore the caves and destroy the mines to defeat the enemy. Your arch is highly developed and equipped with special weapons. You can give directions to your arch as well as your fire by using the arrow keys and destroy mines where your arch cannot reach. Hit the A key to fire and s key to switch between firing modes. You can also launch the trilobite drone unit which will help you explore small routes and unlock paths. Its useful sonar wave will let you find hidden objects as well. If you get hit by a mine you will loose health. There are several stations around which will restore your health.