Commodore Amiga - Homebrew - 1993
Mr. Brownstone is a well done BoulderDash clone. It is a bit more polished than your average freeware Amiga game and takes a fair while to complete. There is a card-code system that can be used to start at higher levels that you have completed. Grab the diamonds, avoid falling boulders, Make your way to the exits when the diamonds are gone. Watch out for baddies.