Play Alien Legacy Online

Alien Legacy is a science fiction strategy game released in 1994 for MS-DOS. Developed by Ybarra Productions and published by Sierra On-Line, it combines 4X and real-time strategy elements from a third-person perspective. The narrative is set in the 22nd century, where players command the seedship UNS Calypso on a mission to colonize the distant Beta Caeli star system after a prior vessel mysteriously vanished.

Players assume the role of the Calypso's captain, managing a colony of thousands with the aid of advisers. Gameplay is divided into three interconnected phases: planetary exploration, global strategy, and colony management. Exploration involves selecting sectors on a planet's map and then switching to a 3D or 2D view to search for symbols that yield resources like ore and energy, discover new life forms, or uncover narrative clues about a lost civilization. This scanning can be enhanced with researched technologies, though it consumes fuel. The strategic layer focuses on dispatching ships to new worlds and directing research across categories such as biology and mathematics, using points gathered from exploration to unlock technologies that improve ship range or resource production.

The colony management phase presents a top-down view where players construct and maintain up to sixteen buildings to produce resources or spacecraft, requiring a steady supply of population, materials, and robots to function. The game progresses in real-time, with rounds representing half a month, and time can be slowed for precision. After approximately two thousand rounds, the initial colonization phase concludes, and the player must engage in a conflict against an unknown adversary.