Build an underground city in this 2D colony sim. Dig, connect production chains and manage workers whose needs can’t wait. Face earthquakes, make difficult choices and explore forgotten regions as you lead a refuge toward a future beyond survival.

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

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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About This Game

A city beneath the world. A future in your hands.

The Undercity: Last Light is a single-player colony management game in 2D pixel art. Light the beacon, welcome survivors and carve a home into the rock. What begins as a small refuge can become a sprawling underground city—with production to keep running, people to look after and a story that leads deeper into the earth.

Dig, build and keep it all connected



Turn excavated chambers into farms, kitchens, workshops and homes. Link raw materials to finished goods, keep supplies moving and choose when to expand or upgrade. A second workshop is useful only when it has the workers, materials and routes to do its job.

Every shift is a choice



Assign specialists, balance day and night work, train the next generation and give tired or injured workers time to recover. Families, aging and colony needs shape the workforce you can rely on. Clear resource readouts, room inspections and contextual guidance help you understand what is holding the colony back.

Keep the colony together through hard times

Prepare for earthquakes, breakdowns and changing hardships. Respond to requests and opportunities, weigh costs against benefits, and decide what needs attention first. Repairs, recovery and new construction compete for the same people and resources. Your decisions shape how the colony grows.

Go deeper. Discover what lies beyond.



Explore the Thermal Rift, Fungal Sea and Resonant Archive, each with its own machinery, hazards and story. Complete Grand Projects, send teams on surface expeditions and pursue a Civilization Project. The current Early Access campaign has a finale; you can keep managing your colony afterward.

Built with player feedback. Early Access updates focus on balance, clarity, stability and the decisions that make each colony feel different. English and Turkish interface text and subtitles are available.

AI Generated Content Disclosure

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

AI tools assisted with portions of the artwork, 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:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 / Windows 11 (64-bit)
    • Processor: Intel Core i3-6100 / AMD Ryzen 3 1200 or equivalent
    • Memory: 8 GB RAM
    • Graphics: Intel UHD Graphics 620 / NVIDIA GeForce GTX 750 Ti / AMD Radeon RX 550 or equivalent
    • DirectX: Version 11
    • Storage: 2 GB available space
    • Additional Notes: Estimated Early Access requirements; minimum hardware has not been benchmarked. Lower resolution recommended for integrated graphics. Keyboard and mouse required. Large colonies and higher simulation speeds are more CPU-intensive.
    Recommended:
    • Requires a 64-bit processor and operating system
    • 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 (dual-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.