AquaWars puts players at the helm of a mighty battleship as you must try to stop waves of incoming rogue submarines. As the game ends when your ship is hit by ten torpedoes, players must successfully avoid the incoming submarine fire while dropping depth charges and collecting power-ups and cash to upgrade your ship.

Players control the ship’s direction and speed by tilting the iPhone and drop depth charges by tapping the left and right sides of the screen. As players destroy enemy subs, power-ups such as increased firepower and invincibility will float up to the surface and give you a significant advantage in the battle.

The game’s visuals are simple but effective, as is the sound. Players also have the option to use their iPod during gameplay to set the soundtrack to the battle. The game offers players one survival style single player mode, but achievements and highscores can be tracked online via OpenFeint access.

AquaWars is a solid game that tends to borrow some of its cues from old school arcade shooters like Space Invaders. Players must focus a lot more on maintaining a solid defence and picking their fights rather than rushing out guns blazing. There are some minor difficulty issues but if you enjoy being pushed then AquaWars will leave you with a challenging experience.