Number 8 in the Matrix Taisen game series.According to the information for this one, there are at least 8 games in the series. Each comes with many 3x3 grid board sections that can be rotated and placed in any configuration. Also, games may be combined, but games 1-4 are one set that is incompatible with games 5-8. Each features SD ('Super Deformed') character, cute-ified versions of regular characters.In this game, the combatants are from the Kamen Rider TV show. - BoardGameGeek