The Crystal Core Virus has swept across the globe. Humanity’s last glimmer of hope lies sealed within this heavily fortified underground facility.
As a test subject in the experimental program, you awaken deep within the facility.
Faced with uncontrollable mutated creatures and supplies that could run out at any moment.

Can you escape alive?

Map Exploration — Unique Board Game-Style Tile Connections

Unlock unknown areas shrouded in mist and embark on a sandbox-style exploration journey filled with variables.
Master the time mechanics and carefully plan every action.
Choose your path forward, and unexpected surprises await you.

Turn-Based Tactical Combat

Face enemies with different characteristics and formulate your action strategy.
Class equipment corresponds to exclusive weapons, allowing you to maximize each weapon’s potential.
Make good use of attribute equipment and items to exploit racial weaknesses and deal additional damage, effectively improving your survival rate on the battlefield.

Roguelite with Story Objectives

As a test subject, you will venture deep into a facility filled with mutated creatures, gradually uncovering the truth hidden within.
Even if you fail the challenge, you can carry the points earned during the run with you to unlock meta-progression, strengthen your abilities, and prepare for your next exploration.

Resource Management — Deep Survival Management

In the dangerous depths filled with crises, make good use of limited resources and master the game's time-based mechanics.
From food, equipment, and materials in your backpack to the three key factors that maintain your team's condition — Stamina, Hunger, and Morale —
every resource expenditure requires careful planning and difficult choices.

Special System — Unlocking Permissions

Through the special Permission System, restart the malfunctioning facility and gradually restore and enhance its various functions.
Different unlocking orders will lead to different gameplay styles and strategies, giving each exploration a unique experience.

Game Features:

• 10 Unlockable Character Classes: Each class has unique growth traits and weapons they specialize in using.

• 4 Powerful BOSSes: Powerful threats that appear randomly, each with unique skills and traits. The deeper you explore, the more challenging they become.

• 2 Branching Endings: Discover key elements to reach different versions of the story’s ending.

• 30 Floors to Explore: Delve deep into the underground facility, exploring each floor to uncover the complete story, encounters, and hidden truths.

• Roguelite Permanent Progression: Experience points and in-game currency accumulated during each playthrough carry over, allowing you to increase permanent abilities and unlock new classes.

• Four Attribute Upgrades: Freely enhance your team’s four core attributes and combine different abilities to create your own unique survival build.

• Collect the Fragments of Truth: Search for research reports and fragmented files scattered throughout the facility, gradually piecing together the clues to uncover the truth behind the disaster that befell the world.