| title | developer | year | platform | | pop. |
|---|
| X Speed Race | Madalin Games | 2013 | Linux | racing/driving sport | | | label | |
| X Speed Race 2 | Madalin Games | 2014 | Linux | racing/driving sport | | | 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: Enforcer | Microprose | 2001 | Windows | action/reflex shooter Science Fiction | image | | 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 | |
| X-Men | Pixel Technologies | 1995 | Mac OS Classic | adventure trivia/quiz | | | label | |
| X-Morph: Defense | Exor Studios | 2017 | PS4 | action/reflex shooter strategy Science Fiction | image | | label | |
| X-Morph: Defense | EXOR Studios | 2017 | Xbox One | action/reflex strategy Science Fiction | image | subject | label | |
| X-Morph: Defense | EXOR Studios | 2017 | Windows | action/reflex shooter strategy Science Fiction | image | | label | |
| X-Plane 10 | Laminar Research | 2012 | Linux | simulation flight | | | label | |
| X-Plane 10 Global - 64 Bit | Laminar Research | 2014 | Linux | simulation flight | | | label | |
| X-Plane 11 | Laminar Research | 2016 | Linux | simulation flight | | | label | |
| X-Plane 11 | Laminar Research | 2016 | Mac OS X | simulation flight | | | label | |
| X2: Wolverine's Revenge | i5works | 2003 | Mac OS X | beat 'em up Science Fiction | | | label | |
| XCOM 2 | Firaxis Games | 2016 | Windows | strategy turn-based Science Fiction | image | | label | |
| XCOM: Enemy Unknown | Firaxis Games | 2012 | Windows | strategy turn-based Science Fiction | image | | label | |
| XCOM: Enemy Unknown | Firaxis Games | 2012 | X360 | strategy turn-based Science Fiction | image | | label | |
| XCOM: Enemy Unknown | Firaxis Games | 2012 | PS3 | strategy turn-based Science Fiction | image | | label | |
| XCOM: Enemy Unknown | Firaxis Games | 2013 | iOS | strategy turn-based Science Fiction | | | label | |
| XCOM: Enemy Unknown | Firaxis Games | 2013 | Mac OS X | strategy turn-based Science Fiction | image | | label | |
| XCOM: Enemy Unknown | Feral Interactive | 2014 | Linux | strategy turn-based Science Fiction | | | label | |
| Xconq | Xconq development team | ? | Linux | strategy board game turn-based | image | subject | label | |
| Xconq | Xconq development team | ? | Linux | strategy board game turn-based | | | label | |
| Xconq | ? | ? | Unix | strategy board game turn-based | | | label | |
| Xenonauts | Goldhawk Interactive | 2014 | Windows | strategy turn-based Science Fiction | image | | label | |
| Xenonauts | Goldhawk Interactive | 2014 | Mac OS X | strategy turn-based Science Fiction | | | label | |
| Xenonauts | Goldhawk Interactive | 2014 | Linux | strategy Science Fiction | | | label | |
| Xenonauts 2 | Goldhawk Interactive | 2018 | Windows | strategy turn-based Science Fiction | | | label | |
| Xenotake | Vosmug | 2014 | Windows | action/reflex Manga | image | | label | |
| Xenus II: White Gold | Deep Shadows | 2008 | Windows | shooter role-play | image | subject | label | |
| XFrisk | - | 1999 | Linux | strategy board game | image | subject | label | |
| XFrisk | - | 1999 | BSD | strategy board game | | | label | |
| XFrisk | - | 1999 | Unix | strategy board game | | | label | |
| XFrisk | - | 1999 | Solaris | strategy board game | | | label | |
| Xrisk | ? | ? | Unix | strategy board game | | | label | |
| Xrisk | ? | ? | BSD | strategy board game | | | label | |
| XS | SCI | 1996 | MS-DOS | action/reflex shooter Science Fiction | | | label | |
| xword | author | 2005 | Linux | puzzle trivia/quiz | image | subject | label | |
