Aqua (also known as Aqua - Naval Warfare) is an arcade-action shooter with tactical elements, driven by a steampunk story in which the vast majority of the world is covered with water. Aqua was developed by Games Distillery on their own proprietary engine and published by Microsoft Game Studios. It was released for the Xbox 360 via Xbox Live Arcade on May 19, 2010. The game is set in an alternate reality where most of the Earth is covered with water and factions war for the remaining pieces of land.

The game received mixed reception from reviewers. Aggregate websites GameRankings and Metacritic report average scores of 66.23% and 61/100, respectively. Critics gave high praise to the game's hand-drawn cutscenes and steampunk setting. Gameplay was received to mixed commentary among reviewers. Critics praised the game's length and some also praised Aqua for attempting to do more than typical twin-stick shooters, but others expressed disappointment in the number of escort missions and lack of online multiplayer.