UIG Entertainment today announced that Mining & Tunneling Simulator is now available on Steam and is 20% off (offer expires on March 12th). In the game, you must blast rocks, drill tunnels and force your way through every mountain. At the beginning you have enough time and no major problems. Once the TNT charges are placed you can start the blasting to create the tunnel entrance. The excavated material will be loaded by a shovel dozer on a dump truck and transported to the storage site. As soon as the entrance is cleaned up the huge tunnel drilling machine will march up.