This is an arcade style submarine game. The object of the game is to destroy all the submarines on each level to advance to the next level. Destroy the submarines by dropping Depth Charges from the back of your Ship. Depth Charges must explode next to the Submarine to damage it. Depth Charges explode at the level in which you touch the screen.

As you progress in the game you can earn credits to help you complete your missions by upgrading your Ship with the following:

- Reduce Depth Charge Load Time

This upgrade will reduce the amount of time it takes the crew to load Depth Charges into the launchers. Select this upgrade when you need to launch Depth Charges more frequently.

- Increase Ship Speed

This upgrade will increase the Ship travel speed. Select this upgrade when you need to be able to catch up to submarines faster.

- Increase Number of Depth Charges

This upgrade is useful when you are not able to complete a mission because you keep running out of Depth Charges. Note: This upgrade is not that effective without first having the Reduce Depth Charge Load Time upgrade.

- Increase Number of Loaded Depth Charges

This upgrade is useful when you need to have more Depth Charges loaded and ready to launch. Note: This upgrade is not that effective unless you have both the Reduce Depth Charge Load Time and Increase Number of Depth Charges upgrades first.