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There were two MS-DOS versions of the game, the floppy disk version and the CD-ROM version. While the floppy version was the original, the CD-ROM release added a full Red Book audio reworked soundtrack, dialogue speech (in English only) and a new playable section of Grace Saunders not present in the original version, which connected the mansion and the ship areas. This version also removed the copy protection from the floppy disk release.