Enjoy free Killer Sudoku whether you're a beginner or an advanced player. Download now and try the Daily Challenge!

With countless Killer Sudoku puzzles available, definitely treat this new Killer Sudoku as a mental workout!

[New] Dark Theme. Perfect for nighttime play!
[New] Color Theme. The game might become more colorful!
[New] Casual Mode. 4×4 and 6×6 boards bring even more fun for you!

Killer Sudoku is a logic-based number puzzle. To solve it, fill in numbers just like in classic Sudoku. The difference is that the sum of the numbers within each cage must match the value shown in the top-left corner of that cage.

If you enjoy Sudoku or number games, Killer Sudoku is perfect for you! If you've played Sumdoku, Addoku, or Cross Sums before, definitely give this Killer Sudoku a try! It's a fantastic combination of Sudoku, KenKen, and Kakuro puzzles.

Killer Sudoku is slightly more challenging than classic Sudoku, but don't worry! Various difficulty levels are available for players of all skill levels—from beginners to experts! The game includes a note-editing feature. Made a mistake? No problem! You can undo your moves and get hints when needed!

How to Play
1. Fill in cells with numbers 1 to 9, just like in classic Sudoku.
2. Cells are divided into different cages by dotted lines.
3. The sum of the numbers inside each cage must equal the value in the top-left corner of that cage.
4. The sum of numbers in each block, row, or column is always 45.
5. No duplicate numbers are allowed within any cage, row, column, or block.

Features
1. Just like solving Sudoku on paper, you can take notes. As you fill in cells, invalid candidates are automatically removed!
2. Real-time error detection helps you spot mistakes instantly. Of course, you can also challenge yourself without assistance!
3. Take on the Daily Challenge and earn trophies!
4. Stuck? Use the hint feature—no worries!
5. Thousands of Killer Sudoku puzzles are ready for you!

Additional Features
1. Statistics tracking allows you to record your gameplay data (and reset anytime).
2. Unlimited retries—make mistakes and quickly go back!
3. Auto-save ensures you never lose progress. Resume anytime, anywhere!
4. A feature to clear all errors at once is included.
5. Share functionality lets you share your achievements on Facebook and Twitter.
6. Four difficulty levels: Easy, Normal, Hard, and Expert (Doctor level).

This Killer Sudoku lets you do brain training anytime, anywhere. With an intuitive interface, clean design, and selectable difficulty levels, this game helps develop logical thinking and enhances your Sudoku skills. Download it now and start playing! Clearing puzzles will refresh your mind and make great entertainment during downtime.

We always check reviews. If you have feedback about what you love or ideas to improve the game, please let us know! Thank you very much.

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