Originally written for the Apple ][ by Bob Liddil and Teri Li (real name Terry Kepner; Google for the details) and published in Byte magazine December 1980, it was subsequently ported to the TRS-80.  This Exidy Sorcerer version dates from around 1981.  Author unknown. I only have the original audio, so no listing source.

Here's a short overview:

"Deep in Arizona's Superstition mountains under the watchful eye of Apache Indians, the fabled LOST DUTCHMAN'S GOLD MINE awaits the adventurer bold enough to challenge the fates. With only a mule and a Winchester, and the ghost of an old gold prospector named BACKPACK SAM to guide you, do you dare to venture into the misty mountains, where it is said that the Devil himself, protects the LOST DUTCHMAN'S GOLD?"

Sean
15/04/2020