V1.1.3
- Adjusted post-clear mode difficulty. - Fixed the Treasure Gallery screen.

Developer posts and news about this game.

- Adjusted post-clear mode difficulty. - Fixed the Treasure Gallery screen.

Fixed bugs

Added relics “USB Drive” and “Holy Graill” Added a feature to view all treasures you have obtained so far Removed “Strike Up” and “Water Stone” “Trinity” has been strengthened and renamed to “Singularity” “Contract” nerfed: activation limit reduced from 3 times to 2 times Adjuste

Fixed several bugs.

- Fixed an issue where cards from treasure chests could not be obtained while the deck window was open - Fixed sorting so it is now always available from the deck window - Fixed a bug that occurred when clicking the “Start Dungeon” button multiple times - Adjusted the brightness

Fixed a critical issue affecting the Print Deck.

We're pleased to announce that Lethal Dungeon is now available, and will be on 10% launch discount for the next two weeks!

We have updated the demo. If you encounter any issues, please let us know. The content is not significantly different from the previous version.

Roguelike card game “Lethal Dungeon” will be released on February 20, 2026 .

The demo is now available to play.