Mansion of Hidden Souls is a game released for the Sega CD and Sega Saturn with a similar format to other puzzle computer games such as Myst, Uninvited and D. The player character wanders through an old mansion in an effort to save his sister. Despite the hardware limitations of the Sega CD, the game featured pre-rendered polygon graphics. Source: Wikipedia, "Mansion of Hidden Souls", available under the CC-BY-SA License.