Screenshots
Watch trailer on Steam ↗Suddenly, The Demon Lord's Labyrinth Appears
Oyatsu Games Studio · Published by Oyatsu Games Studio
Content notice: When attacking enemy monsters, there is a depiction of blood spurting out.
6 user reviews — 100% positive (6 reviews) · 12 achievements
Last updated 28 Sept 2026
Deckbuilding × RPG! Three classes! Build your own deck and challenge the deepest depths of the dungeon!
£3.39
Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Indie, Strategy · 2025 · More under £5 games
Explore Suddenly, The Demon Lord's Labyrinth Appears, an indie strategy game where you build your own deck and choose from three classes to conquer the darkest depths.
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!
System Requirements
Will my PC run this? →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
Supported Languages
Latest news
Patch NotesOfficial
March 20 Update
A simple UI update has been made.Read full article on Community Announcements (ninose)Patch NotesOfficial
March 20 Update
簡単なUIのアップデートを行いました。 A simple UI update has been made.Read full article on Community Announcements (ninose)Patch NotesOfficial
December 19 Update
The card redraw feature has been implemented. Available mana now increases by 1 each turn. カード取得の引き直し機能が実装されました。 毎ターン使用可能マナが1ずつ増えるようになりました。Read full article on Community Announcements (ninose)Patch NotesOfficial
December 19th
Minor UI changes have been made. We plan to release a game update soon.Read full article on Community Announcements (ninose)Patch NotesOfficial
Update the Unity version.
発見されたUnityの脆弱性に対応するアップデートを行いました。 We have released an update addressing the discovered vulnerability in Unity.Read full article on Community Announcements (ninose)
