Any spelunker with a few bombs can take a journey to the center of the earth, but can you Puzzle to the Center of the Earth? In this app that blends match-3 puzzling with platforming, you've got to dig to the bottom of each level, but your path won't always be straight down! You'll need to avoid explosions, traps, and enemies as you carefully carve a strategic path through a ton of colored rocks on your expedition.
Block Fortress is Minecraft meets tower defense meets first person shooter, all squeezed down into a mobile game. Build a base in the middle of a blocky wilderness, place turrets and towers and power supplies to fortify your position, then send in the waves of enemies. Once combat begins, you shift from building mode to combat mode, taking a gun into battle and watching over your fort by blasting enemies by hand. It's incredibly exciting and also deeply rooted in upgrades and tactics, making it the sort of game you can play for months without truly mastering.