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!