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Suddenly, The Demon Lord's Labyrinth Appears
Deckbuilding × RPG! Three classes! Build your own deck and challenge the deepest depths of the dungeon!
Release Date:
Sep 19, 2025
Developer:
Publisher:
Oyatsu Games Studio
Gameplay | Suddenly, The Demon Lord's Labyrinth Appears.
Gameplay | やせいの魔王の迷宮が現れたPV
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Features
Single-player
Steam Achievements
Steam Cloud
Family Sharing
Steam is learning about this game 
Languages:
Interface Full Audio Subtitles
English ✔ ✔
Japanese ✔ ✔
Includes 12 Steam Achievements
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all 12

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$3.99
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About This Game

A brand-new card game that fuses deckbuilding roguelike mechanics with classic RPG elements!

Choose from three distinct classes—Hero, Rogue, and Wizard—each with its own unique card pool, and enjoy fast-paced, strategic gameplay.

Build your own deck and venture into the deepest depths of the dungeon!

AI Generated Content Disclosure

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

Certain images and program elements have been created with the assistance of AI.

Mature Content Description

The developers describe the content like this:

When attacking enemy monsters, there is a depiction of blood spurting out.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • Storage: 1 GB available space
    Recommended:
    • Requires a 64-bit processor and operating system
    • Storage: 1 GB available space
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