Is the arcade puzzle game game created for the Commodore
64 home micro back in the mid 80's and was released by FirstStar sofware. The central character Rockford
had to collect a certain amount of diamonds to escape each cave and proceed onto the next level - it even made it into the Arcades using the Amiga
hardware if I remember correctly.
It IS NOT to be confused with Balderdash
to mean "nonsense; something stupid or untrue".. you stupid mofo
Boulderdash remains a classic examples great gameplay and of the Commodore 64s supremacy.