Devil Dice, known in Japan as XI, pronounced [sai], is a puzzle video game developed by Shift and published by Sony Computer Entertainment for the PlayStation.

[6] Around this time, the official website interviewed lead designer Yuichi Sugiyama (then the representative director of Shift), which revealed that the game was created within the scope of the Game Yarōze program.

A demake titled XI Little was only released in Japan exclusively on the WonderSwan Color by Bandai in 2001.

It is the first portable video game based on a Sony Computer Entertainment property.

Xi Coliseum was only released in Japan exclusively on PlayStation Portable.

This version includes support for ad hoc wireless play between up to five players.