Xenonauts is a tactical strategy game that immerses players in a Cold War-era scenario, where they lead a multi-national military organization against an alien invasion. The gameplay revolves around managing small squads of soldiers in turn-based ground combat, emphasizing the importance of strategy and resource management. Players can develop their soldiers, engage in intense battles, and recover alien technology to enhance their capabilities.

The game features a robust strategic layer that allows players to oversee the defense of the Earth by deploying interceptors to intercept UFOs and researching captured alien artifacts. This research unlocks new equipment and insights, providing a deeper understanding of the extraterrestrial threat. With its blend of tactical combat and strategic planning, Xenonauts offers a compelling experience for strategy game enthusiasts.