| X air combat | — | — | Microsoft Windows |
| X-It | — | Data Design Interactive | — |
| X-Men 2: Clone Wars | platform game | — | — |
| X-Men vs. Street Fighter | crossover fiction, fighting game | Capcom | arcade video game machine |
| X-Plane 7 | simulation video game | — | — |
| X-Scape | first-person shooter, vehicular combat game | Q-Games | Nintendo DSi |
| X-treme Express | — | Syscom Entertainment | PlayStation 3 |
| X2 | — | Team17 | — |
| X3: Reunion | — | Egosoft | Microsoft Windows, macOS, Linux |
| X4: Foundations | science fiction video game, space trading and combat game | Egosoft | Microsoft Windows, Linux |
| Xak III: The Eternal Recurrence | role-playing video game | Microcabin | TurboGrafx-16, NEC PC-9800 series |
| Xanadu Next | action role-playing game | — | Microsoft Windows, N-Gage |
| Xanagrams | — | — | Amstrad CPC |
| XDasher | casual game, action game | Pixel Beef Games | Microsoft Windows |
| Xenoblade Chronicles 2 | action role-playing game, Japanese role-playing video game, video game with LGBT character | Monolith Soft Inc. | — |
| Xenoblade Chronicles 2: Torna – The Golden Country | action role-playing game, Japanese role-playing video game | Monolith Soft Inc. | — |
| Xenoblade Chronicles X | action role-playing game | Monolith Soft Inc. | Wii U |
| XENOS Defense | — | — | Microsoft Windows |
| Xenosaga Episode I | role-playing video game | Monolith Soft Inc. | — |
| Xenosaga I & II | role-playing video game | — | Nintendo DS |
| Xentron Attack | action game | — | Microsoft Windows |
| Xia Zhi Xin Tiao | strategy video game, role-playing video game | — | Microsoft Windows |
| Xiaolin Showdown | — | Bottlerocket Entertainment | Nintendo DS |
| XS | — | Eidos Interactive | Microsoft Windows, DOS |
| Xtreme Racing | — | — | Amiga 1200 |
| Xuan-Yuan Sword VII | role-playing video game | Softstar Entertainment | Microsoft Windows |
| Xuan-Yuan Sword: Dance of the Maple Leaves | role-playing video game | — | Microsoft Windows, DOS |
| Xuan-Yuan Sword: The Cloud of Han | role-playing video game | — | Microsoft Windows |
| スグリ "SUGURI" a little war in brand-new earth. | 2D fighting game, bullet hell | — | Microsoft Windows |
| 熱血高校ドッジボール部 PCサッカー編 | association football video game | — | — |