The Mars Saga does have disk protection on it called Pirateslayer. But there is also a codewheel used in this game when the player enters a city from the surface. Below is a code wheel you can print out and use. Also in the ZIP file is the codes in a list made by CronicBadger on Lemon64 here: http://www.lemon64.com/forum/viewtopic.php?t=42187&postdays=0&postorder=asc&highlight=code+wheel&start=25
CLICK Here for the scans: MarsSaga-Codewheel
Credits also to: Rekrul for his hard work on this codewheel!
Here is another set with CREDITS to: Jerrykurtz