SteamWorld Dig

SteamWorld Dig is an independent platforming action game developed by Image & Form. It is the second installment in the series.
You play as a steam-powered robot named Rusty. He moves to a town of Tubleton after inheriting his uncle's mine. He starts to mine and explore the underground world unraveling the remains of human civilization on his way.
The main objective is to investigate the mines. At the beginning of the game the player is only equipped with a pickaxe, but more and more mining equipment is unlocked as the game progresses. The equipment is also upgradable as the game goes on. The mines are procedurally generated on every playthrough and useful items appear in different places. Collected ores and resources can be sold in a shop outside the mine. There are several underground worlds to explore which feature various enemies.
If the player gets lost in the mine they can either use the ladders that are sold in the store or use the self-destruct button. All collected loot is lost on death but can be picked up again.