Popular games published by company Mark Data Products

The Black Sanctum (text version 1981, graphics added 1984) is the second game by Ron Krebs to be converted by Stephen O’Dea and Bob Withers for TRS-80 Color Computer. According to the manual, "Your object in this game is to overcome the forces of evil."

You have to retrieve artifacts which were stolen from a museum and solve the mystery as to why.