From the review, "SteamWorld Dig is difficult to classify in a categorical sense. It bills itself as being inspired by Metroidvania games, but that’s only true of the sequential challenge rooms containing Rusty’s upgrades. After upgrading the pickaxe, there is little stopping you from pressing onward and exploring the randomly generated mine shafts and focusing on collecting ore. The game feels much more like a combination of Mr. Driller and Terraria with a bit of I Wanna Be The Guy thrown in obnoxiously when familiar hazards start “falling” upward. Whatever SteamWorld Dig is, it’s definitely fun. The game provides a perfect sense that there are things hidden just a little further in every direction, and that’s often precisely the case."