| title | developer | year | platform | | pop. |
|---|
| Pocket UFO | SMK Software | 2006 | WinCE | strategy turn-based Science Fiction | | | label | |
| Pocket UFO | SMK Software | 2006 | Windows | strategy turn-based Science Fiction | image | | label | |
| Pocket UFO | SMK Software | 2006 | Mobile | strategy turn-based Science Fiction | | | label | |
| UFO: Afterlight | ALTAR Games | 2007 | Windows | strategy role-play Science Fiction | image | subject | label | |
| UFO: Aftermath | ALTAR Interactive | 2003 | Windows | strategy Science Fiction | image | subject | label | |
| UFO: Aftershock | ALTAR Interactive | 2005 | Windows | strategy Science Fiction | image | subject | label | |
| UFO: Extraterrestrials | Chaos Concept | 2007 | Windows | strategy turn-based Science Fiction | image | subject | label | |
| UFO2Extraterrestrials: Battle for Mercury | Chaos Concept | TBA | Windows | strategy role-play turn-based Science Fiction | | subject | label | |
| X-COM: Apocalypse | author | 2014 | Linux | strategy Science Fiction | | | label | |
| X-COM: Apocalypse | Microprose | 1997 | MS-DOS | strategy Science Fiction | image | subject | label | |
| X-COM: Enemy Unknown | Microprose | 1995 | PS | strategy turn-based Science Fiction | image | subject | label | |
| X-COM: Terror from the Deep | Microprose | 1996 | PS | strategy turn-based Science Fiction | image | | label | |
| X-COM: Terror from the Deep | Microprose Software | 1995 | MS-DOS | strategy turn-based Science Fiction | image | subject | label | |
| X-COM: Terror from the Deep | Microprose Software | 1999 | Windows | strategy turn-based Science Fiction | image | subject | label | |
| X-COM: Terror from the Deep | ? | ? | 3DO | strategy turn-based Science Fiction | | | label | |
| X-COM: Terror from the Deep | ? | ? | Pandora | strategy turn-based Science Fiction | | | label | |
| X-COM: UFO Defense | Mythos Games | 1999 | Windows | strategy turn-based Science Fiction | | | label | |
| X-COM: UFO Defense | Mythos Games | 1994 | MS-DOS | strategy turn-based Science Fiction | image | subject | label | |
| X-COM: UFO Defense | Mythos Games | 1994 | Amiga AGA | strategy Science Fiction | image | subject | label | |
| X-COM: UFO Defense | Mythos Games | 1994 | Amiga CD32 | strategy Science Fiction | image | | label | |
