- Requires a 64-bit processor and operating system
- OS: Windows 10 64 bit
- Processor: Intel Core i3-3240 (2 * 3400); AMD FX-4300 (4 * 3800)
- Memory: 4 GB RAM
- Graphics: GeForce GTX 750 Ti 2GB
- DirectX: Version 11
- Storage: 4 GB available space
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About this game
Show more Show less
Feature Summary
Mine endlessly – Swing your pickaxe or blast entire mineral veins for resources
Explore a vast underground world – Discover secrets of humanity’s downfall
Befriend Monster Girls – Gain allies with unique abilities for battle and life
Build your base – Craft, decorate, and create a home underground
Automate production – Unlock machines and logistics to accelerate progress
Fight powerful enemies – Explore dangerous ruins and forgotten technologies
Full Description
After surface civilization's destruction, you're an underground survivor exploring a world of unknowns and dangers. Wield your pickaxe, explore ruins, befriend Monster Girls, build automated production lines, construct your base, and return to the surface!
Grip your pickaxe and extract abundant underground resources. Chip away at rock walls or use powerful explosives to blast entire mineral veins - enjoy the satisfying destruction. Collect ores and rare materials to fuel construction, production, and equipment upgrades.
Meet Monster Girls with unique abilities during your underground adventures. Each has distinct personalities, but earn their trust and they become powerful combat allies with special exploration skills. They also help at your base with farming, cooking, gathering, and production - boosting your survival efficiency.
The vast underground hides countless secrets and dangers. From deep caverns to forgotten human ruins, fight alongside Monster Girls against powerful creatures, discover scattered lost technologies, and uncover the truth behind humanity's downfall.
Start with just a pickaxe, but master lost technologies to create powerful machinery. Construct automated production and logistics systems to power the super drill and accelerate your surface return.
In this sunless world, a comfortable, functional base ensures survival. Build workbenches, craft furniture, plan production and living areas, defend against underground creatures, and transform a crude cave into a warm home with your Monster Girl companions.
Take up your pickaxe, join your Monster Girl companions, explore underground secrets, and become the first human to return to the surface!
System Requirements
Swipe- Requires a 64-bit processor and operating system
- OS: Windows 10 64 bit
- Processor: Intel Core i5-3470
- Memory: 16 GB RAM
- Graphics: GeForce GTX 1660 6GB
- DirectX: Version 11
- Storage: 4 GB available space
Player reviews
It's sort of like a core keeper lite; featuring monster girl companions, some lightweight automation, and a linear narrative driven story. Its relatively simple and straightforward by comparison, but it still scratche...
Its fun I like! little better than core keeper just a little bit in the art not the game play!
News
All news
11 months ago
Medium Update V1.0.8<p class="bb_paragraph">Hey fellow adventurers!</p><p class="bb_paragraph"> </p><p class="bb_paragraph">Greetings! We're excited to announce that version 1.0.8 is launching soon. This update brings several majo
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Return from Core - PC (Steam)
About
Feature Summary Mine endlessly – Swing your pickaxe or blast entire mineral veins for resources Explore a vast underground world – Discover secrets of humanity’s downfall Befriend Monster Girls – Gain allies with unique abilities for battle and life Build your base – Craft, decorate, and create a home underground Automate production – Unlock machines and logistics to accelerate progress Fight powerful enemies – Explore...
- Platform
- Steam (PC)
- Developer
- 顽核社 Funcore Club
- Publisher
- 2P Games, Shochiku
- Release date
- 17 Jul, 2025
- Languages
- Genres
- Action, Adventure, Indie, RPG, Simulation
- Product type
- Digital key / activates on Steam
Supported languages
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Description
Feature Summary
Mine endlessly – Swing your pickaxe or blast entire mineral veins for resources
Explore a vast underground world – Discover secrets of humanity’s downfall
Befriend Monster Girls – Gain allies with unique abilities for battle and life
Build your base – Craft, decorate, and create a home underground
Automate production – Unlock machines and logistics to accelerate progress
Fight powerful enemies – Explore dangerous ruins and forgotten technologies
Full Description
After surface civilization's destruction, you're an underground survivor exploring a world of unknowns and dangers. Wield your pickaxe, explore ruins, befriend Monster Girls, build automated production lines, construct your base, and return to the surface!

Grip your pickaxe and extract abundant underground resources. Chip away at rock walls or use powerful explosives to blast entire mineral veins - enjoy the satisfying destruction. Collect ores and rare materials to fuel construction, production, and equipment upgrades.

Meet Monster Girls with unique abilities during your underground adventures. Each has distinct personalities, but earn their trust and they become powerful combat allies with special exploration skills. They also help at your base with farming, cooking, gathering, and production - boosting your survival efficiency.

The vast underground hides countless secrets and dangers. From deep caverns to forgotten human ruins, fight alongside Monster Girls against powerful creatures, discover scattered lost technologies, and uncover the truth behind humanity's downfall.

Start with just a pickaxe, but master lost technologies to create powerful machinery. Construct automated production and logistics systems to power the super drill and accelerate your surface return.

In this sunless world, a comfortable, functional base ensures survival. Build workbenches, craft furniture, plan production and living areas, defend against underground creatures, and transform a crude cave into a warm home with your Monster Girl companions.
Take up your pickaxe, join your Monster Girl companions, explore underground secrets, and become the first human to return to the surface!
System Requirements
- Requires a 64-bit processor and operating system
- OS
- Windows 10 64 bit
- Processor
- Intel Core i3-3240 (2 * 3400); AMD FX-4300 (4 * 3800)
- Memory
- 4 GB RAM
- Graphics
- GeForce GTX 750 Ti 2GB
- DirectX
- Version 11
- Storage
- 4 GB available space
- Requires a 64-bit processor and operating system
- OS
- Windows 10 64 bit
- Processor
- Intel Core i5-3470
- Memory
- 16 GB RAM
- Graphics
- GeForce GTX 1660 6GB
- DirectX
- Version 11
- Storage
- 4 GB available space
News

a month ago
6/24 Minor Update
<p class="bb_paragraph">Dear Explorers,</p><p class="bb_paragraph"></p><p class="bb_paragraph">We have deployed a hotfix to address the following issues:</p><p class="bb_paragraph"></p&

10 months ago
Minor Update V1.0.9
<p class="bb_paragraph">Hey fellow adventurers!</p><p class="bb_paragraph">We've released a minor update addressing the following issues:</p><p class="bb_paragraph"> </p><ul class="bb_ul">

11 months ago
Medium Update V1.0.8
<p class="bb_paragraph">Hey fellow adventurers!</p><p class="bb_paragraph"> </p><p class="bb_paragraph">Greetings! We're excited to announce that version 1.0.8 is launching soon. This update brings several majo
Best Reviews
👍 Recommended · Steam player · 7 Jul 2026
It's sort of like a core keeper lite; featuring monster girl companions, some lightweight automation, and a linear narrative driven story. Its relatively simple and straightforward by comparison, but it still scratches that same itch if you're looking for something different. It goes on sale frequently. I cant say it'll wow your socks off, but I certainly think it's worth trying out for the price.
1 found this helpful
👍 Recommended · Steam player · 2 Jul 2026
Its fun I like! little better than core keeper just a little bit in the art not the game play!
1 found this helpful
Recent Reviews
👍 Recommended · Steam player · 7 Jul 2026
It's sort of like a core keeper lite; featuring monster girl companions, some lightweight automation, and a linear narrative driven story. Its relatively simple and straightforward by comparison, but it still scratches that same itch if you're looking for something different. It goes on sale frequently. I cant say it'll wow your socks off, but I certainly think it's worth trying out for the price.
1 found this helpful
👍 Recommended · Steam player · 2 Jul 2026
Its fun I like! little better than core keeper just a little bit in the art not the game play!
1 found this helpful



