DEG Steam metadata

• Steam app typegame
• Steam App ID4044990
• PriceNo longer available on Steam Store
• Release date2026
• DeveloperDoseo
• PublisherDoseo
• Parent gameNot available

Genres: Casual, Indie

Company pages: Developer: DoseoPublisher: Doseo

No longer available on Steam Store. This app is no longer available for purchase on the Steam Store. SteamPulse keeps live player counts, media, metadata, and historical price snapshots where available.

Top Steam chartsTop 100 gamesGame directoryNo current Steam Store offer

DEG Steam metadata

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Latest Steam announcements

• Important update v1.353 - 12 May 2026

  Some content has been removed from the demo version, including:All puzzles from 1-2All colored puzzlesFor more information about the full version, please see:

• Patch 1.351 - 26 February 2026

  Fixed an issue where rainbow boards would display incorrectly in new saves if they had been completed in an old save file. Temporarily added a small number of tutorial puzzles for the rainbow rules. Added a visual effect to better highlight the special properties of the rainbow rules.

• Demo v1.32 Major Update - 23 February 2026

  New Content AddedApproximately 1–2 hours of additional gameplay:All remaining puzzles in Areas 1–2 are now unlocked.Rule #2 has been added.Several puzzles featuring Rule #13 have been added.Mixed-rule puzzles have been added (originally planned for the mid-game).Important NotesAll newly added content will be available only during Steam Next Fest. Once the event ends, this content will be removed.Players who have already completed 100% of the demo do not need to restart. All new content will seamlessly integrate into existing save files.

• Important Bug Fix Notice - 21 January 2026

  If you’re using the patch updated on January 21, 2026, you may encounter the following issues:Unable to unlock new boardsRight-clicking buttons may fail to complete a boardHow to fix:Return to the Steam client and update the game.Create a new save file (do not delete your old save)Use Shift + Left Click to quickly complete puzzles that were already finished in your previous save, until you reach your current progress

• Demo Main Update v1.31 - 19 January 2026

  Game ContentAll puzzle stages have been completely rebuilt.Over 100 puzzles across 7 different puzzle types.The early-game difficulty has been significantly reduced, with an improved overall difficulty curve.The original two modes have been redesigned:Free Mode allows you to open the manual at any time to review the rules.Exploration Mode requires players to discover and infer the rules on their own.A new Operation Manual has been added, allowing players to review learned rules and controls.Unique environmental ecosystems have been added for different puzzle types.A new Cave area has been introduced, primarily serving as a tutorial zone for various rules and a space for variant puzzles.A new Check feature has been added, enabling quick detection of rule violations on the current puzzle board.ImprovementsMost actions can now be completed using the mouse, such as checking puzzles, switchi…

• Demo Version V1.24 Update - 3 November 2025

  New FeaturesIn Note Mode: Shift + Mouse Wheel now switches note colors (red, blue, and yellow).In Note Mode: Shift + Ctrl + Mouse Wheel adjusts the thickness of notes and the size of the eraser.Bug FixesFixed an issue where the Z key could not undo marking actions.Fixed an issue where notes could not be erased in certain cases.

• Demo Version 1.23 Update - 25 October 2025

  New FeaturesAdded adjustable language localization options;Added support for cloud saves;Bug FixesFixed display issues with certain fonts;

• Demo Version 1.22 Update - 24 October 2025

  New FeaturesLabel Function: Use the shortcut Alt + \ to save the current puzzle state to the corresponding slot, and \ to load the puzzle state from that slot.Operation ImprovementsAdded WASD keys for map movement, and slightly increased movement speed and acceleration.Slightly adjusted the position of the triangle marker.Marker operations are now consistent during dragging.Other ChangesAdded simple descriptions for different difficulty modes.Adjusted some tutorial stages.Adjusted the positions of several levels.

• Demo V1.21 Update - 21 October 2025

  New FeaturesAdded note eraser: In note mode, press E to switch to erase mode. You can use Shift + Mouse Wheel to adjust the eraser size, and Right Click to erase notes.Added difficulty selection:In Normal Mode, after completing a certain number of tutorial stages, the corresponding rules will be shown directly as text.In Hard Mode, tutorials will still require players to deduce the rules on their own.Puzzle FixesFixed duplicate boards — 2 duplicated puzzles were replaced with a new one.Fixed all puzzles that previously had multiple valid solutions.ChangesRemoved all text-based riddles from the demo. These will appear only in the full version; the demo no longer includes encrypted text puzzles.

• Demo Version V1.2 Major Update - 17 October 2025

  Update HighlightsReconstructed most of the puzzles;Added a new puzzle type and removed the old dual-solution puzzle type;Improved the tutorial stages for the rules;Significantly restructured the level design;Greatly reduced the overall difficulty of the demo and adjusted the difficulty curve.

• Demo Version V1.14 Update - 14 October 2025

  Note System RefactorPress Tab to switch between Color Mode and Note Mode. Different cursor colors indicate the current mode: red for Note Mode, white for Color Mode.In Note Mode:Left Mouse Button – Draw notesRight Mouse Button – Select notesX Key – Delete notes or selected notesShift + Mouse Wheel – Adjust note thicknessIn Color Mode:Right Mouse Button – Mark a cell with a red triangleShift + Right Mouse Button – Mark a cell with a blue triangleR Key – Clear all coloring on the current boardX Key – Clear all marks on the current board

• Demo Version V1.13 Update - 11 October 2025

  Game Updates / OptimizationsNew Feature: Undo (Z) or Redo (U) coloring and marking actions, supporting up to 200 steps.New Feature: Double-tap R to clear all marks.Audio Optimization: Lowered the volume of certain BGM tracks.Level Optimization: Adjusted the structure of some green-number puzzle levels.

• Demo Version V1.12 Update - 11 October 2025

  Program and Game Design FixesFixed an issue with level display in the letter zones.Temporarily adjusted the simple tutorial for the green question mark.Game OptimizationNew Feature: You can now replay completed boards. The border color indicates each board’s completion status.New Feature: When the camera is fully zoomed out, borders of completed boards will automatically be hidden.New Shortcut: Press V to toggle the visibility of completed board borders.Update Preview (v1.2)Rebuilt most levels to make the DEMO version’s gameplay better match its intended theme.Improved tutorial levels for rule explanations.Added several new large boards and hybrid-rule puzzles in the DEMO version.

• Demo Version V1.1 Update - 10 October 2025

  Program and Game Design FixesFixed unintended solutions in 4 puzzle levels.Fixed music stuttering when switching tracks.Fixed UI display issues at different screen resolutions.Game OptimizationOptimized the note system, and now the note shortcut keys can be previewed in-game.Progress in the current level is now saved in the save file and will not be lost when re-entering the level.If levels unlocked in other save files exist, pressing Shift + Left Click on a cell in that level will instantly unlock it in the current save.Added 20+ puzzles to the demo version.Fixed display errors in several puzzle levels.Added tutorial levels for certain rules.

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