Time to get digging. Mines of Mars is a wholly addicting mining and exploration game created by Crescent Moon Games. It plays a lot like the classic Motherload or the criminally underappreciated early iOS release iDigIt. Take your pickaxe and start pecking away at the soil, gathering metals and gems you can carry back to the surface to refine into useable materials. Then take those materials and upgrade your tools so you can dig even deeper!
Scuba is a 2D, side-scrolling game of exploration, diving, mining, and crafting in the tradition of Minecraft and Terraria. Control your diver-character as you collect 10 types of resources above ground and underwater. Combine items in your inventory to craft parts that will eventually help you make an engine to get home. Scuba's random world generation gives you a different game environment each time you play.