| Release History | |||
|---|---|---|---|
| Title | yyyy-mm-dd | Region | Platform |
| X-COM: UFO Defense | 1993-12-31 | North America | DOS |
| X-COM: UFO Defense | 1995-10-25 | North America | PlayStation |
| X-COM: Enemy Unknown | 1995-11 | Europe | PlayStation |
| UFO: Enemy Unknown | 1995 | United Kingdoms | Amiga |
| X-COM: UFO Defense | 1995 | North America | Amiga |
| UFO: Enemy Unknown | 1995 | Germany | Amiga |
| X-COM: Michi Naru Shinryakusha | 1997-07-31 | Japan | PlayStation |
| X-COM: UFO Defense | 1998 | North America | Windows |
| UFO: Enemy Unknown | Unknown | Europe | DOS |