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A 9x9 Sudoku-based logic puzzle with eight original constraints. Every stage is solved through pure logic alone, with no assumptions or brute force. The thrill comes when one breakthrough makes the board suddenly unravel. Even seasoned Sudoku players will find fresh discoveries and real challenge.
PC (Microsoft Windows) · May 28, 2026
Worldwide · Exact date · Full release · IGDB
Catalog sources
38 achievements available.

Earn a Hexagram for the first time
LockedSteam

Fill every stage in Chapter 1 with at least Circle
LockedSteam

Fill every stage in Chapter 2 with at least Circle
LockedSteam

Fill every stage in Chapter 3 with at least Circle
LockedSteam

Fill every stage in Chapter 4 with at least Circle
LockedSteam

Fill every stage in Chapter 1 with at least Triangle
LockedSteam

Fill every stage in Chapter 2 with at least Triangle
LockedSteam

Fill every stage in Chapter 3 with at least Triangle
LockedSteam

Fill every stage in Chapter 4 with at least Triangle
LockedSteam

Fill every stage in Chapter 1 with Hexagram
LockedSteam

Fill every stage in Chapter 2 with Hexagram
LockedSteam

Fill every stage in Chapter 3 with Hexagram
LockedSteam

Fill every stage in Chapter 4 with Hexagram
LockedSteam

Fill all stages with Hexagram
LockedSteam

Clear any stage in no more than half of its target time
LockedSteam

Clear within target time while having 2 mistakes
LockedSteam

Clear a Chapter 4 stage for the first time
LockedSteam

Clear a stage that mixes 3 types of constraints
LockedSteam

Clear a stage that mixes all constraint types
LockedSteam

Create and publish a stage with Complement Mirror (sum to 10)
LockedSteam

Create and publish a stage with Flowing Stair (ascending)
LockedSteam

Create and publish a stage with Parity Bind (same parity)
LockedSteam

Create and publish a stage with Factor Chain (factor/multiple)
LockedSteam

Create and publish a stage with Solitary Core
LockedSteam

Create and publish a stage with Adjacent Friction (no consecutive adjacency)
LockedSteam

Create and publish a stage with Twin Stars
LockedSteam

Create and publish a stage with Gear
LockedSteam

Receive the first like on your published stage
LockedSteam

Clear another player's published stage that includes Complement Mirror
LockedSteam

Clear another player's published stage that includes Flowing Stair
LockedSteam

Clear another player's published stage that includes Parity Bind
LockedSteam

Clear another player's published stage that includes Factor Chain
LockedSteam

Clear another player's published stage that includes Solitary Core
LockedSteam

Clear another player's published stage that includes Adjacent Friction
LockedSteam

Clear another player's published stage that includes Twin Stars
LockedSteam

Clear another player's published stage that includes Gear
LockedSteam

Rate another player's published stage
LockedSteam

Clear another player's no-assumption stage with difficulty score over 100
LockedSteam
Community notes