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Fill elegant diagrams with the correct numbers using three simple rules. Rondoku invites you to think, take your time, and enjoy beautifully hand-crafted challenges.
Linux · Oct 23, 2025
Worldwide · Exact date · Full release · IGDB
PC (Microsoft Windows) · Oct 23, 2025
Worldwide · Exact date · Full release · IGDB
Catalog sources
12 achievements available.

Complete the first puzzle
LockedSteam

Complete 3 puzzles
LockedSteam

Complete 5 puzzles
LockedSteam

Complete 7 puzzles
LockedSteam

Complete 10 puzzles
LockedSteam

Complete 13 puzzles
LockedSteam

Complete 16 puzzles
LockedSteam

Complete 20 puzzles
LockedSteam

Complete the Regular Book
LockedSteam

Complete 30 puzzles
LockedSteam

Complete 50 puzzles
LockedSteam

Hidden until unlockedSteam
Community notes