Killer Sudoku by Sudoku.com

Contains adsIn-app purchases
4.4
209K reviews
10M+
Downloads
Content rating
USK: All ages
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About this game

Killer Sudoku will let you enjoy an exciting experience! Jump into the new Sudoku gameplay, solve tons of new challenging number puzzles, and train your brain! Install Killer Sudoku now for free!

This free Killer Sudoku number game comes from the developer of the world’s most downloaded classic Sudoku puzzle – Sudoku.com. Hence, be sure you’ll get a stellar experience, extra game quality, and a lot of joy with the Killer Sudoku puzzle.

Although Killer Sudoku may seem a bit harder than classic sudoku, we made it accessible for players of all skill levels. This number puzzle game comes with several difficulty levels – easy, medium, hard, and expert Killer Sudoku. This way, the Killer Sudoku puzzles are great for both beginners and advanced Sudoku solvers.

What is Killer Sudoku

Killer Sudoku is a true legend among all number games and puzzles. In a nutshell, it’s a perfect blend between a free sudoku puzzle game and a kakuro game.

This number puzzle goes by many names: Sumdoku, Addoku, Cross-sum, etc, but the rules are equally simple across the board. Your goal is to fill the grid with numbers like in classic Sudoku and also make sure that the sum of numbers in cages (areas separated by dotted lines) is equal to the number in the upper left corner of that cage.

How to play Killer Sudoku

✓ Fill all rows, columns, and 3x3 blocks with numbers 1-9 exactly like in classiс Sudoku
✓ Pay attention to the cages – groups of cells indicated by dotted lines.
✓ Make sure that the sum of numbers in each cage is equal to the number in the upper left corner of the cage.
✓ The specific rule of the Killer Sudoku puzzle is that the sum of all numbers of each 3x3 block, row, or column always equals 45.
✓ Numbers cannot repeat within cages, a single row, column, or 3x3 region.

Killer Sudoku features

✓ Complete free Killer Sudoku Daily Challenges to compete for awards
✓ Take part in Seasonal Killer Sudoku Events and win unique medals
✓ Challenge your logic figuring out your mistakes, or enable Auto-Check to see your mistakes
✓ Add notes if you’re not sure which number to place. Enjoy the experience of the classic paper-and-pen puzzle games.
✓ Use hints when you are stuck in a really hard number puzzle.

More Killer Sudoku features

- Statistics. Track your daily Killer Sudoku progress, best time, and other achievements
- Unlimited Undo. Made a mistake? No worries, undo it in one tap
- Colour themes. Select classic Light, Dark, or Sepia themes to design your own Killer Sudoku kingdom!
- Auto-save. If you get distracted and quit your Killer Sudoku game unfinished, we’ll save it for you so you can continue anytime.
- Eraser. Erase any mistakes you made in a number puzzle.

Killer Sudoku number puzzle is now available on the vast majority of phones and tablets. Install Killer Sudoku for free, train your brain, and have fun along the way!

DISCLOSURES AND YOUR CONSENT

By clicking on the “install” button you hereby consent that this app and any subsequent updates and upgrades of it (further “the App”) are installed on your device. You further confirm your understanding that the normal functioning of the App may from time to time include: (x) collecting of your data under our Privacy Policy to provide the features and functionality need to personalize your customer experience; (w) automatic communication of your device with our servers to support the functionality in order to provide you with the best customers experience; (z) affecting certain preferences and data stored on your device related to the functioning of the App. You may choose to uninstall the App at any time. For more details, please see our

EULA: https://easybrain.com/terms
Privacy Policy: https://easybrain.com/policy.html

In case of questions, please contact us by email: privacy@easybrain.com
Updated on
Oct 20, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location, Financial info and 3 others
This app may collect these data types
Location, Financial info and 3 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.4
187K reviews
Adamm1726
October 13, 2025
I was able to put up with the intrusive mid game ads most would be put off by. But now you NEED to click on them and go to the play store just to go back to the game? No exit button on the ad? is that even legal??? Absolutely not putting up with it. If you're interested in the type of game, there are better, less intrusive/harassing apps to play it on. Absolutely ridiculous.
4 people found this review helpful
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Easybrain
October 13, 2025
Hi! Thank you for your feedback. We acknowledge that the rise in ads has affected your experience. Your input is valuable as we strive to improve the balance between gameplay and advertisements. If you face an unskippable ad or any issues, please share a screenshot via the "Help" section in the app. We’ll look into it.
Beth Madigan
March 24, 2025
I really enjoy Killer Sudoku, but I wish I could see the score of the game as I finish. The screen with my score disappears in the blink of an eye and the current score does not show anywhere in the summaries. ☹️☹️. difficult to keep track of how my games are going when I can only see the very best score of the day, week, month and not the rest of my play
44 people found this review helpful
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Easybrain
May 2, 2025
Hi! We appreciate your feedback on tracking scores and understand your desire for clearer summaries. Your thoughts are valuable to us! Please contact us via the "Help" section in the app with any suggestions.
Ih An
July 21, 2025
I think there is not enough detail about how to play the game. I tried to guess which number goes into which square. It is a game which has no logic behind things. It's like you try to guess and do mistakes and keep repeating again. A game should have some logic. If there are two fields and their sum is = 10. I have to guess if the left field is 4 and the right field is 6 or viceversa or the numbers have to be changed like 9 - 1 or 2 - 8 and so on. Random numbers with same sum are not accepted.
Did you find this helpful?
Easybrain
July 22, 2025
Hi! Thanks for downloading our game. The rules to Sudoku are here: open the app, tap "Me," and select "How to Play." We recommend starting with Easy and using Hints if you're stuck. Please get in touch with us via the "Help" section in the app if you have any questions.

What’s new


We hope you enjoy playing Killer Sudoku. We read all your reviews carefully to make the game even better for you. Please leave your feedback on why you love this game and what you'd like to improve. Keep your mind active with Killer Sudoku!