Xenonauts is a turn-based science fiction video game developed and published as the maiden title of London-based independent game studio Goldhawk Interactive. Inspired by the 1994 game UFO: Enemy Unknown, gameplay involves the player taking the role of the commander of a clandestine organization known as the Xenonauts, and attempting to defeat an alien invasion of Earth in the alternative history year 1979. The game was released on June 17, 2014 for Microsoft Windows. Ports to Mac OS X and Linux were initially based on the Wine compatibility layer, until native ports became available in September 2015. A sequel, Xenonauts 2, was released through early access in 2023.