Deep Dungeon is very much like Wizardry with the exception that you are not controlling a whole party but a single hero through eight maze-like dungeon levels to get rid of the evil overlord who is responsible for kidnapping the princesses soul.
This little game came in a standalone cassette as a free game with the second issue of the Spanish magazine "Juegue Con Su Amstrad", which roughly translates to "Play With Your Amstrad".
This time around, it's a duel between two cowboys.