As a kid I played a first person adventure game which was set in the medieval/dark ages. It was from the early 90's if not old and the screen layout was similar to Minecraft where all your weapons and items are on a little inventory bar at the bottom of the screen. The storyline is someone has stolen the King's ruby and you have to get it back, and as you go through the game you collect currency called 'crowbs' which you in turn use to buy armour, weapons and other supplies.
I've been trying to find out for over 2 decades and it's bugging me. Does anyone have any idea what the game might have been called?