Drill deeper, explore mysterious underground biomes, collect valuable resources and upgrade your drilling machine. Choose your route carefully as you descend through an ever-expanding underground world. Manage your energy and cargo, discover different resources, then return to the surface to sell your haul and improve your machine. Upgrade your drill, battery, cargo capacity and drive system to reach greater depths and uncover richer deposits. How deep can you go? Features: • Endless underground exploration • Route-based tactical decisions • Resource collection and trading • Permanent machine upgrades • Multiple underground biomes • Incre
