Once Grandpa Pecos decided to share a secret with his grandson ? there's a hidden treasure buried somewhere on the former mine. But there's one problem. The treasure lies very deep underground at a depth of more than 100 yards! Then the grandson thought about his friend, the Mad Digger. He's the only one to get things done. Your task is to dig deeper and deeper until you find the treasure. It's not as simple as it seems. The oxygen runs out with every descent, you need to extract minerals to improve your equipment and tools as well as to buy grenades and dynamite to make the descent faster.

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