Killer Sudoku by Sudoku.com

Contains adsIn-app purchases
4,5
206K reviews
10M+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

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 maths 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
- 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 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
11 Apr 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
184K reviews
Beth Madigan
24 March 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
28 people found this review helpful
Did you find this helpful?
Easybrain
02 May 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.
Steve Kerr
10 June 2025
They recently added full screen ads during the game. The ad breaks my train of thought and I have to find my place when it ends. Just a terrible idea. There is already a banner ad at the bottom of the screen. That is acceptable. Leaving the puzzle mid thought is not. And no, the little happy face praising my last move does not make up for it.
8 people found this review helpful
Did you find this helpful?
Easybrain
10 June 2025
Hi Steve! Thank you for taking the time to share your feedback. We completely understand how frustrating mid-game ads can be. We’re always working to support the app better and maintain a smooth, enjoyable player experience.
M M
21 July 2025
Pls remove the scoring at the top. I already toggled off "auto check for mistakes", this live scoring effectively brings it back. Bad update and a common complaint. Edit 2025-07. Thought I'd give it another go. Live scoring is still there and not optional, effectively acting as confirmation of correct number input. Awful if you don't want it.
1 person found this review helpful
Did you find this helpful?
Easybrain
19 November 2024
Hello! Thank you for sharing your feedback with us. We understand that not all players may enjoy the changes. Right now, the score feature is not optional. We prioritize player feedback and continually test new ideas, bringing in only the most popular features. Your input is valuable to us, and we’ll keep it in mind as we work to improve. šŸ’š

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!