# Explore. Survive. Descend. Explore, build and survive in the depths of a forgotten underground world. Manage oxygen, power and resources while digging ever deeper in search of rare materials, ancient bunkers and hidden secrets. Build machines, automate production, expand your underground base and uncover what lies beneath the surface. Every expedition requires careful planning, as darkness, limited supplies and environmental hazards stand between you and the unknown. Descend deeper. Survive longer. Discover the truth hidden below. [](