This is Sorcerian System Scenario Vol. 1 for the PC-8801. All text is in Japanese.
This set is additional disks for the original Sorcerian game — you'll need the original Sorcerian disks to play this Pyramid scenario. As is often the case with floppy disks this old, there may be some mold on the disks, so we cannot guarantee they'll play in their current condition.
