Simple game play but highly addictive! Release depth charges or torpedo to destroy incoming enemy submarines, gain score and gold, upgrade your ship, defeat the dreadful BOSS... Enjoy the great naval battle!Features:- User friendly game playThe game is easy to control, the clear instructions will make you familiar the game play easily.- Fast pace and pure actionControl your ship, using two different weapons to destroy incoming enemy submarines and avoid their attack. As the game progress, your need to upgrade your ship to make it stronger to deal with stronger and smarter enemies!- Different enemiesThe new type of enemy submarine will join the battle when game difficulty increased. They are not only different on their appearance, they also equipped with different weapon and do different actions.- Upgrade systemYou gain score and gold for each enemy submarine destroyed. You can spend the gold to repair your ship, upgrade your ship's weapon, boost your ship's engine power and even upgrade to bigger and stronger battle ship!