King under the Mountain is a simulation-based settlement-building management game set in a fantasy world.

This settlement could be a dwarven stronghold dug into a mountain, a human town of various buildings, a tribe of orcs in a conquered dungeon, or even a lone wizard’s fortress filled with traps and magical constructs. The player gives orders to the population of their settlement: to collect resources, dig out mines, construct buildings and workshops, craft equipment and weapons, set up farms and the like. This plays out in real time as these orders are carried out, with the player reacting to disasters – natural or otherwise.