Undermaster

Undermaster is a free to play game where the player is the lord of a dungeon. Excavate rock, build rooms, and buy furniture and appliances to keep your minions happy. The dungeon can be expanded from a handful of rooms to a sprawling multi-level complex. As the player completes quests, they will earn experience; at higher levels, more items and features unlock. Minions range from simple earth imps to trolls and warlocks.

The game uses a crystal shop for microtransactions. These can be bought with money or found in-game, and can be used to instantly clear rock, speed up other actions, buy decorations, or trade for other resources.