Killer Sudoku by Sudoku.com

Contains adsIn-app purchases
4.5
206K reviews
10M+
Downloads
Content rating
Everyone
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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 app comes from the developer of the world’s most downloaded classic Sudoku puzzle – Sudoku.com. So a stellar experience, extra game quality, and endless fun are guaranteed.

Whether you’re a fan of classic Sudoku or just looking for a number game or math puzzle for a great time and mental workout, free Killer Sudoku is here for you.

Although Killer Sudoku seems 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, Killer Sudoku puzzles are great for both beginners and advanced Sudoku solvers. We have no doubt you’ll become a Killer Sudoku master in no time!

What is Killer Sudoku

Killer Sudoku is a true legend among number games and puzzles. In a nutshell, it’s a perfect blend of those fave brain-twisters Sudoku and Kakuro. Absolutely free!

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 while making sure the sum of numbers in the cages (areas separated by dotted lines) is equal to the number in the upper left corner of that cage. Still sounds complicated? Let’s review the Killer Sudoku rules in detail.

How to play Killer Sudoku

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

Killer Sudoku features

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

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
- Color 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 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!

Terms of Use:
https://easybrain.com/terms

Privacy Policy:
https://easybrain.com/privacy
Updated on
Apr 11, 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

4.5
185K reviews
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. ā˜¹ļøā˜¹ļø. 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
33 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.
Poppy Peregrine
September 1, 2025
I can only do a couple of moves before im slammed with 3 unskippable adds in a row and sometime the add gets "stuck"(aka you have to click the add and visit the store to even be able to skip.) Not only that you want me to pay the same amount I pay for a streaming service like Netflix or Chrunchy just to not have adds... Why is every app like this? I would rather buy this app and be with no adds than to support you with $10 a month, which is ridiculous for something as simple as sudoku. 0 of 5.
1 person found this review helpful
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Easybrain
September 1, 2025
Hello. We appreciate your feedback regarding the impact of ads on your experience. Your input is vital as we strive to enhance the balance between gameplay and advertisements. A one-time payment is required to remove ads. Please send a screenshot of any unskippable ad via the "Help" section in the app, and we will address it.
Alex Smith
August 25, 2025
I enjoyed this game, but with the ads constantly popping up mid game, it has to go. The ads disrupt the flow of the game and occur very frequently. I do not believe anything will change, as the developer has left comments on reviews for over a year saying they will look into it and the ads remain. Most frustrating of all, the ads hi-jack the game, and force you to open the Play Store to be allowed to close them out. Dev: I will not send screenshots of the ads. Review the ads you allow yourself.
2 people found this review helpful
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Easybrain
August 25, 2025
Hi! Alex! Thank you for your feedback. We're sorry that the ads disrupted your gameplay. We understand how frustrating it can be when ads interrupt the experience. We're working to improve the balance between ads and gameplay.

What’s new

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