Aqua, also known as Aqua — Naval Warfare and just Naval Warfare on Steam, is a straightforward twin-stick Shoot'Em Up developed by Games Distillery of Bratislava, Slovakia. It was published by Microsoft for Xbox Live Arcade on May 19, 2010, and later by Just a Game GmbH for Steam on May 25, 2011. The player assumes the role of Emperrean steam-cruiser Captain Benjamin Grey, a snarky Officer and a Gentleman. Together with perky Chief Engineer Polly Edison and assorted crew, Grey uses his small, but fast and heavily-armed warship to put the hurt on the bad guys.