02 Logic puzzle
Cosmoku Sudoku
Relight the sky, one puzzle at a time.
Android: join the waitlist - Free
- Puzzle
- Ages 4+
- 80.1 MB
- Version 5.0
- star charts
- 800
- worlds
- 8
- ways to play
- 5
About the game
Cosmoku Sudoku turns the world’s favourite logic puzzle into a journey across the night sky. Every puzzle is a star chart, and every chart you solve lights another star.
Start with the bright, forgiving charts of the Inner System, then work outward through the Belt and the Outer Reach to the Deep Void, where there’s almost nothing to go on. It’s built for complete beginners and seasoned solvers alike.
Every puzzle lights a star
Each solved chart relights a star in its constellation: 400 free charts across forty constellations.
Four new ways to play
The Keeper’s Seal opens four more worlds of Sudoku variants: X-Sudoku, 6×6, Hyper and Killer. That’s 400 more charts.
Daily signals
A fresh puzzle in the Signal Log every day, with transmissions worth decoding.
Help when you need it
A calm, clutter-free board, smart hints for when you’re stuck, achievements and fully offline play.
A look inside
The map
From home stars to the Singularity
Four free regions of sky, each a step up in difficulty, then four Keeper’s worlds with new rules.
- Inner SystemEasy. Home stars: warm, bright, forgiving.
- The BeltMedium. Charts scrambled by asteroid interference.
- Outer ReachHard. Faint signals, colder light.
- Deep VoidExpert. Almost nothing to go on. Only the brave.
- The CrossingKeeper’s world. X-Sudoku: the diagonals count too.
- The ShallowsKeeper’s world. Quick 6×6 boards.
- The NebulaKeeper’s world. Hyper Sudoku, with four extra regions.
- The SingularityKeeper’s world. Killer Sudoku, with cages to add up.
Information
- Developer
- Prithvi Krishna
- Category
- Puzzle
- Price
- Free, with in-app purchases
- In-app purchases
- Yes
- Compatibility
- iPhone, iPad, Mac with Apple silicon, Apple Vision Pro. Requires iOS 16.4 or later.
- Size
- 80.1 MB
- Languages
- English
- Age rating
- 4+
Questions
Something else? Contact support or read the privacy policy.
How many puzzles are there?
800 star charts. 400 are free, spread across four regions from Easy in the Inner System to Expert in the Deep Void. The Keeper’s Seal adds 400 more in four variant worlds: X-Sudoku, 6×6, Hyper and Killer.
Can I play offline?
Yes. Cosmoku Sudoku plays fully offline.
What is the Keeper’s Seal?
An optional purchase that removes every ad for good, unlocks the four Keeper’s worlds and adds more hints per game. It also helps keep the observatory afloat.
Is it coming to Android?
Yes. Join the Android list on the home page and you’ll get one email when it lands.
Ready to play Sudoku?
Free on the App Store for iPhone and iPad. Android is coming soon.
Android: join the waitlist More from Cosmoku
All games
