Send your dwarves into the mountain, choose where they should dig, and bring back gold, gems, resources, and artifacts. Every expedition feeds directly back into your base: build new rooms, expand production, improve your dwarves, unlock upgrades, and prepare for longer and more profitable runs. The deeper you go, the more valuable the rewards become, but every expedition is limited by your burning torch, so pushing farther always comes with a risk.
Over time, the game shifts from managing a handful of dwarves and basic facilities into optimizing an increasingly complex mining operation.