| Id | Name | Systems | Actions |
|---|---|---|---|
| 3472 | WWF WrestleMania Challenge | NES | Versions |
| 3466 | WWF WrestleMania: Steel Cage Challenge | NES | Versions |
| 2521 | X | GB | Versions |
| 2182 | X-COM: UFO Defense | PSX | Versions |
| 1595 | X-Men | Genesis | Versions |
| 278 | X-Men 2: Clone Wars | Genesis | Versions |
| 551 | X-Men vs. Street Fighter | Arcade | Versions |
| 334 | X-Men: Mutant Apocalypse | SNES | Versions |
| 1590 | X-Men: The Official Game | GBA | Versions |
| 1502 | X-Men: Wolverine's Rage | GBC | Versions |
| 341 | X2: Wolverine's Revenge | GBA | Versions |
| 3754 | Xanthiom | A2600 | Versions |
| 3196 | Xardion | SNES | Versions |
| 671 | Xena: Warrior Princess | GBC | Versions |
| 1193 | Xexyz | NES | Versions |
| 2906 | Xybots | Lynx | Versions |
| 2401 | Yars' Revenge | A2600 | Versions |
| 3008 | Yathzee | C64 | Versions |
| 2732 | Yazzie | Genesis | Versions |
| 883 | Yie Ar Kung-Fu | NES | Versions |
| 1424 | Yie Ar Kung-Fu II: The Emperor Yie-Gah | MSX | Versions |
| 540 | Yo! Noid | NES | Versions |
| 3410 | Yo! Noid 2: Enter the Void | MacOS | Versions |
| 938 | Yoshi Touch & Go | DS | Versions |
| 2482 | Yoshi's Cookie | NES | Versions |