Culdcept Saga (カルドセプト サーガ Karudoseputo Saaga?) is a video game developed exclusively for the Xbox 360 video game console. It is the first entry for a Microsoft console in the Magic-meets-Monopoly game franchise that included previous installments on the PlayStation, PlayStation 2, Sega Saturn and Dreamcast.

A demo of the title was made available to Xbox Live users on December 4, 2007. The demo includes two different pre-made card decks and supports both single player gameplay and local multiplayer for up to four players.[1] Initially released in Japan in 2006, the full game wasn't released in North America until more than a year later, in February 2008, but has never been released in Europe or Australia.