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The Undercity: Last Light
Build an underground colony where every decision has a human cost. Dig, organize workers and keep production moving while managing fatigue and conflicting needs. Survive earthquakes, explore forgotten regions, and shape your refuge into a civilization.

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Features
Single-player
Steam Achievements
Family Sharing
Steam is learning about this game 
Languages:
Interface Full Audio Subtitles
English ✔ ✔
Turkish ✔ ✔

Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“The Undercity is about managing people as well as resources. Its production chains, social pressures, regional machinery and difficult decisions need feedback from different play styles. Early Access will help us refine the balance, make consequences easier to understand and improve performance as colonies grow.”

Approximately how long will this game be in Early Access?

“We expect approximately 6–12 months of Early Access after launch. This estimate may change based on player feedback and development progress.”

How is the full version planned to differ from the Early Access version?

“We plan to focus on stronger colony management decisions, more varied events, clearer interfaces and better performance and stability. We would also like to deepen longer-term progression beyond the existing civilization milestones. The scope and priorities may change based on testing and player feedback.”

What is the current state of the Early Access version?

“The current build lets you grow a refuge into an underground settlement through excavation, construction, upgrades, production, research and workforce management. It includes families, education, social demands, injuries and aging, breakdowns and earthquakes. You can follow the story through cinematics, explore the Thermal Rift, Fungal Sea and Resonant Archive, complete Grand Projects, run surface expeditions and pursue a Civilization Project. The current campaign has a finale, followed by continued colony management. English and Turkish interface text and subtitles are available. Balance, usability and performance are still being refined, and bugs may occur. Progression beyond the current campaign remains limited.”

Will the game be priced differently during and after Early Access?

“We plan to gradually raise the price as content and features are added during Early Access and for the full release.”

How are you planning on involving the Community in your development process?

“We plan to use Steam Discussions for bug reports, suggestions and feedback on balance, clarity and colony performance. Reports about difficult-to-understand decisions and growing colonies will help us set priorities. We also plan to share development updates and patch notes on Steam.”
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This game is not yet available on Steam

Planned Release Date: Oct 30, 2026

This game plans to unlock in approximately 2 weeks

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About This Game

A home beneath a dying world. A future shaped by your decisions.

The Undercity: Last Light is a single-player colony simulation in 2D pixel art. Light a beacon for other survivors, carve a settlement into the rock, and lead the people who make it their home. Expanding is only part of the challenge: your colony must be able to live with the choices that make it grow.

Carve out a colony that works

Excavate galleries, connect floors and build farms, kitchens, workshops and homes. Workers carry materials between rooms and storage. Plan your layout, assign specialists and choose whether to expand or invest in stronger upgrades. A new workshop is only useful if people and supplies can reach it.

Your people have limits

Match professions and shifts to the work your colony needs. Long hours can help you through a shortage, but exhaustion and injuries take workers away from production. Families need homes; the next generation needs training. Decide how much to invest in rest, care and education while keeping the colony supplied.

Choose what you can afford to sacrifice

Respond to requests, take on trade commitments and weigh immediate supplies against effects that last for colony days. Put scarce materials into research, repairs or expansion. Your decisions, workforce and room specializations shape how your colony develops along its story.

Keep the lights on when the ground shakes

Prepare for breakdowns and earthquakes. Fund maintenance, strengthen safety and care for the injured. When damage spreads through your colony, choose what to restore first—and what must wait.

Build toward a future beyond survival

Discover the Thermal Rift, Fungal Sea and Resonant Archive, each with its own machinery, hazards and story. Follow the signals beneath your colony, restore forgotten machinery and uncover the story through discoveries and cinematic scenes. Undertake Grand Projects, send teams on surface expeditions and choose a Civilization Project. Reach the current campaign finale, then continue caring for the settlement you built.

What will your people endure to reach the light?

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

AI tools assisted with portions of the artwork, animations, cinematic illustrations, text, and localization. No AI content is generated during gameplay.

Mature Content Description

The developers describe the content like this:

The game includes survival themes such as shortages, illness, injury, disasters and death. Colony residents may die due to accidents, earthquakes, unmet needs or old age. These events are conveyed through stylized pixel graphics and text notifications, without graphic gore or sexual content.

System Requirements

Windows
macOS
    Minimum:
    • OS: Windows 10 / Windows 11 (64-bit)
    • Processor: Intel Core i5-6500 / AMD Ryzen 3 1200 or equivalent
    • Memory: 8 GB RAM
    • Graphics: NVIDIA GeForce GTX 750 Ti / AMD Radeon RX 550 (2 GB VRAM) or equivalent
    • DirectX: Version 11
    • Storage: 2 GB available space
    • Additional Notes: Estimated Early Access requirements; minimum hardware has not been benchmarked. Keyboard and mouse required. Large colonies and higher simulation speeds are more CPU-intensive.
    Recommended:
    • OS: Windows 10 / Windows 11 (64-bit)
    • Processor: Intel Core i5-8400 / AMD Ryzen 5 2600 or equivalent
    • Memory: 16 GB RAM
    • Graphics: NVIDIA GeForce GTX 1050 / AMD Radeon RX 560 or equivalent
    • DirectX: Version 11
    • Storage: 2 GB available space
    • Additional Notes: Estimated recommendation for larger colonies. SSD recommended. Keyboard and mouse required.
    Minimum:
    • OS: macOS 12 Monterey or later
    • Processor: Apple M1 or Intel Core i5 (quad-core, 64-bit)
    • Memory: 8 GB RAM
    • Graphics: Apple M1 integrated GPU or Metal-compatible Intel/AMD graphics
    • Storage: 2 GB available space
    • Additional Notes: Estimated Early Access requirements; minimum hardware has not been benchmarked. Native Apple Silicon and Intel support. Keyboard and mouse required.
    Recommended:
    • OS: macOS 12 Monterey or later
    • Processor: Apple M1 or better
    • Memory: 16 GB RAM
    • Graphics: Apple M1 integrated GPU or better
    • Storage: 2 GB available space
    • Additional Notes: Estimated recommendation for larger colonies. SSD recommended. Keyboard and mouse required.
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