| Xicat InteractiveEU | Publisher | |
| Xicat InteractiveNA | Publisher | |
| Xicat InteractivePAL | Publisher | |
| Xider Games | Publisher | |
| Xientra | Developer | |
| Xieyubing123 | Developer | |
| XiferGames | Developer | |
| Xilam | DeveloperPublisher | |
| Xillidonno | Developer | |
| XimioniLabs | Developer | |
| Ximo | Developer | |
| Ximpa | Developer | |
| Ximsol182 | Developer | |
| Xiness | DeveloperPublisher | |
| Xing | DeveloperPublisher | |
| Xing Entertainment | DeveloperPublisher | |
| Xing Inc. | Developer | |
| Xintetsu | Developer | |
| Xinyu Miao | Developer | |
| Xionviel | Developer | |
| Xiperius | Developer | |
| Xiris | Developer | |
| Xitilon | DeveloperPublisher | |
| Xixo Game Studio | DeveloperPublisher | |
| Xkeeper | Developer | |
| Xochi Interactive | Developer | |
| Xocolatl Games | Developer | |
| Xona Games | DeveloperPublisher | |
| Xondaro | Developer | |
| Xonha | Developer | |
| Xortrapa Soft | Publisher | |
| Xortrapa Soft (Julian Alarcon, Alberto Blanco, Joaquib, Abdul, Alex Gutierrez) | Developer | |
| XpAlliance | Developer | |
| Xpec | Developer | |
| Xpec Entertainment | Developer | |
| Xpiral | Developer | |
| Xplosiv | DeveloperPublisher | |
| XplosivEU | Publisher | |
| XplosivPAL | Publisher | |
| XrespectadripX | Developer | |
| XryEcho | Developer | |
| Xsco Games | Developer | |
| Xseed Games | DeveloperPublisher | |
| Xseed GamesNA | Publisher | |
| Xslash | Developer | |
| Xtalsoft | DeveloperPublisher | |
| Xtreme Games | Developer | |
| Xtreme Games LLC | Publisher | |
| Xtreme Prime | Developer | |
| XtremeZero | Developer | |