The Undercity: Last Light

Build below. Survive together.

The Undercity: Last Light is a single-player colony management game in 2D pixel art. Light a beacon to bring survivors home, carve rooms into the rock and turn a fragile refuge into an underground city. Follow the signals deeper into the earth while keeping the people who depend on you alive.

Build a colony that keeps moving

Dig galleries, connect floors and build farms, kitchens, workshops and homes. Workers carry materials through your colony: a productive room needs supplies, people and a route between them. Balance production chains, assign specialists across shifts, and choose between expanding your layout and investing in powerful upgrades.

Lead people, not just production lines

Your colonists work, rest, form families and grow older. Train new specialists, care for the injured and make room for the next generation. A longer shift may solve today's shortage, but tired workers need time to recover. More hands are useful only if you can feed and house them.

Make the hard call—and live with it

Respond to requests and situations arising in your colony. Rest an exhausted crew or keep a vital mine running? Spend scarce resources on repairs or push toward the next discovery? Compare the trade-offs, make your choice and see its consequences unfold over colony days. Your priorities shape the settlement you build.

Hold together when the ground shakes

Prepare for breakdowns and earthquakes with maintenance and safety improvements. When disaster strikes, tend to casualties and decide which rooms to restore first. Recovery competes with the same resources and workforce you need to keep growing.

Discover a future beyond survival

Explore the Thermal Rift, Fungal Sea and Resonant Archive, each with its own machinery, hazards and story. Restore forgotten systems, uncover cinematic story moments, complete Grand Projects and send teams on surface expeditions. Choose a Civilization Project and reach the current campaign finale, then continue managing the colony you made your own.