Dig Dug Deeper

In this version, you must dig tunnels in order to look for treasures hidden beneath the ground. But of course monsters will hinder your progress in your search for riches, but you can just plow them down with your drill. There are dozens of levels, both 2D and 3D, as well as a few bonus levels along the way that you can play as both new and old characters alike. (mobygames.com)