Starting with one base, two fighters, one transport, and a few soldiers, X-COM must locate the aliens, learn about their origins and technology, find out where their base is, and destroy it. It was eventually decided to organize a secret paramilitary group, dubbed Extraterrestrial Combat Unit (X-COM). Finally, after various nations of the world have failed to intercept the UFOs, their representatives met in a conference of global importance in Geneva, Switzerland. Stories about abductions and alien attacks became more and more widespread. In the year 1998, the amount of reports of UFO sightings has been drastically increased. Play UFO: Enemy Unknown CZ online here! UFO: Enemy Unknown (CZ) game description It was published by MicroProse in 1994 for MS-DOS and Amiga computers. UFO: Enemy Unknown (marketed as X-COM: UFO Defense in North America) is a science fiction strategy video game developed by Mythos Games and MicroProse.