GameCube - X
- X-Men - Legends
- X-Men - Next Dimension
- X-Men - the Official Game
- X-Men 2 - Wolverine's Revenge
- X-Men 2 - Wolverines Revenge
- X-Men Legends
- X-Men Legends 2
- X-Men Legends 2 - Rise of Apocalypse
- X-Men Legends 2 - Rise of the Apocalypse
- X2 - Wolverine's Revenge
- XG3 - Extreme Racing
- XG3 Extreme G Racing
- XGRA
- XGRA - Extreme G Racing Association
- XGRA - Extreme-G Racing Association
- XIII