* X2: Wolverine's Revenge
* X-Files: Resist or Serve
* X-Men Legends
* X-Men Legends II: Rise of Apocalypse
* X-Men: Next Dimension
* X-Squad
* X-Men: The Official Game
* Xenosaga Episode I: Der Wille zur Macht (Namco)
* Xenosaga Episode II: Jenseits von Gut und Böse (Namco)
* Xenosaga Episode III: Also sprach Zarathustra (Namco)
* XGRA: Extreme-G Racing Association
* XIII
