SubTerra

From Spiderweb Software:

SubTerra is an exciting and classic-style arcade game with a mix of action and puzzle solving. There's this mine, you see. There's lots of gems there, waiting unhappily for their rightful owners to come and dig them up. It goes without saying that those gems would be much happier in your pockets. But then there are the traps, rudely left by the miners. Massive boulders, ready to crush you, or worse, the gems. Laser beams, teleporters, monsters, locked doors, poltergeists. Machines which can duplicate everything, including you. Spiders. Slimes. And, of course, the Evil Skull of Death. To get the gems out, you'll have to figure out how to get to them, how to keep from getting smashed or eaten, and how to get out afterwards. There are easier, safer, and, let's face it, smarter ways to get rich. But what would be the fun in that?