| Name | Types | |
|---|---|---|
| Wyvex | Developer | |
| Wzqxrys | Developer | |
| X | Developer | |
| X Games | Developer | |
| X Plus | Developer | |
| X Shitei Brand | Developer | |
| X Software | DeveloperPublisher | |
| X Woomy | Developer | |
| X and Z Productions | Developer | |
| X-Ample Architectures | Developer | |
| X-E-A | Developer | |
| X-Eleven Games | Developer | |
| X-Nauts | Publisher | |
| X-NautsKO | Publisher | |
| X-Ray Interactive | Developer | |
| X-Stream Digital | Developer | |
| X-Ways | DeveloperPublisher | |
| X-ample | Developer | |
| X-ample Architectures | Developer | |
| X-bow Software | Developer | |
| X-ray | Developer | |
| X.D. Network | DeveloperPublisher | |
| X2Sたr | Developer | |
| X3R9 | Developer | |
| X4 Games | Developer | |
| XAIN | Publisher | |
| XAND | Developer | |
| XAV | Developer | |
| XCROWE | Developer | |
| XCVG | Developer | |
| XCVZXC | Developer | |
| XCreator Minigames | Developer | |
| XDEV | Developer | |
| XDennisZero | Developer | |
| XDev | Developer | |
| XENVITA | Developer | |
| XGen Studios | DeveloperPublisher | |
| XI-ART | Developer | |
| XIMPLE APPS | Developer | |
| Publisher | ||
| XING Entertainment | Publisher | |
| XIX: Boy Band Simulator | Developer | |
| XM7md | Developer | |
| XMPTGames | Developer | |
| XNBlank | Developer | |
| XOR Corporation | DeveloperPublisher | |
| XPEC | Developer | |
| XPEC Entertainment | DeveloperPublisher | |
| XPEC Entertainment Inc. | Developer | |
| XProductions | Developer | |
| XPromus | Developer | |
| XRNZ | Developer | |
| XS Games | DeveloperPublisher | |
| XS Games, LLC | Publisher | |
| XS GamesEU,NA | Publisher | |
| XS GamesNA | Publisher | |
| XSEED | Developer | |
| XSEED GamesNA | Publisher | |
| XStables | Developer | |
| XTOPY | Developer | |
| XXXTenTesticles | Developer | |
| XXpoomaanXX | Developer | |
| XXv Productions | DeveloperPublisher | |
| XYZ | DeveloperPublisher | |
| XYZ Productions | Developer | |
| X_Games | Developer | |
| X_games | Developer | |
| Xack22 | Developer | |
| Xain | DeveloperPublisher | |
| Xain Soft | DeveloperPublisher | |
| Xak | Developer | |
| Xalavier Nelson Jr. | Developer | |
| Xaloc Studios | Developer | |
| Xalomango | Developer | |
| Xalph555 | Developer | |
| Xand | Developer | |
| Xander | Developer | |
| Xander Wardell | Developer | |
| XanderHD | Developer | |
| Xanderwood | Developer | |
| Xandes66 | Developer | |
| Xandir | Developer | |
| XandroGame | Developer | |
| Xangotrick | Developer | |
| Xanjos | Developer | |
| Xankill3r | Developer | |
| Xantera | Developer | |
| Xanth Software | Developer | |
| Xanthus | Developer | |
| Xanz | Developer | |
| XardoX | Developer | |
| Xarian Okean | Developer | |
| Xaruto | Developer | |
| Xascoria | Developer | |
| Xatrix | Developer | |
| Xatrix Entertainment | Developer | |
| Xavi Lucena | Developer | |
| Xavi Smith | Developer | |
| Xaviant | DeveloperPublisher | |
| Xavid | Developer |