| Title | Genre | Score | Release Date |
|---|---|---|---|
| X Gold | Compilation | 2001 | |
| X Motor Racing | GT / Street Racing | TBA | |
| X Rebirth | Space Combat Sim | TBA | |
| X Scooter | Sports | 2001 | |
| X-Blades | Beat-'Em-Up | Feb 9, 2009 | |
| X-Change | Adventure | Mar 9, 2001 | |
| X-COM Alliance | Sci-Fi First-Person Shooter | Canceled | |
| X-COM: Apocalypse | Sci-Fi Turn-Based Strategy | 8.6 | Jun 30, 1997 |
| X-COM: Collector's Edition | Sci-Fi Turn-Based Strategy | Nov 24, 1999 | |
| X-COM: Enforcer | Sci-Fi Shooter | 6.4 | Apr 18, 2001 |
| X-COM: First Alien Invasion | Sci-Fi Turn-Based Strategy | 6.2 | Sep 30, 1999 |
| X-COM: Interceptor | Space Combat Sim | 7.5 | May 31, 1998 |
| X-COM: Terror From the Deep | Sci-Fi Turn-Based Strategy | 7.2 | Feb 28, 1995 |
| X-COM: UFO Defense | Sci-Fi Turn-Based Strategy | 9.0 | Dec 31, 1993 |
| X-COM: Unknown Terror | Compilation | 1996 | |
| The X-Factor: Sing | Rhythm / Music | Oct 21, 2005 | |
| The X-Files Game | Adventure | 5.1 | May 31, 1998 |
| The X-Files: Unrestricted Access | Sci-Fi First-Person Shooter | Jan 1, 1997 | |
| X-Games Pro Boarder | Snowboarding | Nov 15, 1998 | |
| X-Men II: Fall of the Mutants | Sci-Fi Action Adventure | 1990 | |
| X-Men Evolution Mini CD-Rom | Action | December 2001 | |
| X-Men Legends II: Rise of Apocalypse | Action Role-Playing | 8.1 | Sep 20, 2005 |
| X-Men Origins: Wolverine | Action | 7.0 | May 1, 2009 |
| X-Men vs. Street Fighter | 2D Fighting | 2002 | |
| X-Men: Children of the Atom | 2D Fighting | 6.7 | May 31, 1997 |
| X-Men: Madness in Murderworld | Adventure | 1989 | |
| X-Men: The Official Game | Beat-'Em-Up | 5.6 | May 16, 2006 |
| X-Men: The Ravages of Apocalypse | Adventure | 4.9 | Nov 30, 1997 |
| X-Plane | Flight Simulation | 7.1 | Nov 30, 2000 |
| X-Plane 10 | Jet Sim | TBA | |
| X-Plane 8 | Jet Sim | 7.9 | Dec 10, 2004 |
| X-Plane 9 | Simulation | 2008 | |
| X-Plane Version 7 | Jet Sim | 2003 | |
| X-Superbox Bundle | Compilation | Oct 8, 2010 | |
| X-Tension | Space Combat Sim | Oct 8, 2010 | |
| X-Wing Collector's Series | Space Combat Sim | 8.2 | May 31, 1998 |
| X-Wing vs. TIE Fighter: Balance of Power | Space Combat Sim | 8.3 | Nov 30, 1997 |
| X10 | Fantasy First-Person Shooter | Canceled | |
| X2: The Return | Space Combat Sim | Apr 29, 2005 | |
| X2: The Threat | Space Combat Sim | 7.4 | Dec 3, 2003 |
| X2: Wolverine's Revenge | Sci-Fi Action Adventure | 5.7 | Apr 15, 2003 |
| X3 Gold | Compilation | Nov 11, 2009 | |
| X3: Albion Prelude | Action | Dec 15, 2011 | |
| X3: Reunion | Space Combat Sim | 7.2 | Nov 10, 2005 |
| X3: Terran Conflict | Space Combat Sim | Mar 31, 2009 | |
| X3: Terran War Pack | Compilation | Mar 9, 2012 | |
| X: Beyond the Frontier | Space Combat Sim | 8.1 | Jan 26, 2000 |
| Xango Tango | Puzzle | Oct 27, 2006 | |
| Xargon: The Mystery of the Blue Builders | Fantasy Action Adventure | 1993 | |
| Xarlor - Infinite Expanse | Action | 2000 |
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