Raijinhai is a fictional game from the first series that is said to have originated in India. It is a guessing based game where two players use their pieces to eliminate the other's. The win conditions apparently vary, but three are presented in the show:
- The opponent has no more pieces
- The opponent has no pieces stronger than the other player's
- The opponent's king has been taken.
Pieces are chosen behind a screen and so the game is based on the player's knowledge of statistics as well as their application of psychology. Aileen Rao challenged Dark Yugi to a game with Anzu Mazaki's life on the line.
The pieces and what they do are as follows.