Killer Sudoku - Sudoku Puzzle

Contains adsIn-app purchases
16.7K reviews
Content rating
PEGI 3
1M+
Downloads
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About this game

Enjoy the free Killer Sudoku puzzle games for both beginners and advanced Sudoku lovers! Download and start the daily challenge for free!

Thousands of killer sudoku puzzles here for you to solve. Come to play this new killer sudoku game, and train your brain. Have fun!

[New] Dark Theme. Perfect to play before bad!
[New] Color Theme. Playing games could be colorful!
[New] Casual Mode. 4*4 and 6*6 boards bring you more fun!

Killer Sudoku Free is a logical puzzle number game & brain game. To complete a puzzle, like the classic sudoku game, you can fill the grid with numbers; unlike the classic sudoku puzzle, you have to make sure that the sum of numbers in each cage (areas surrounded by the dotted lines) is equal to the number in the upper left corner of the cage.

If you are interested in playing number games or math puzzle games, this Killer Sudoku is exactly for you! If you'd ever played number games, such as Sumdoku, Sumoku, Addoku or Cross sum, come to try this one, too! It is an amazing combination of a sudoku puzzle, a KenKen and a Kakuro puzzle game.

Killer Sudoku may be a little bit harder than a classic sudoku puzzle game, no worries! We offer several balanced difficulty levels for beginners and advanced players! The game has the function to add or remove notes during gameplay. Did you make a mistake at the beginning? No worries, there are undo and hint functions! Get it back fast!

How to play:

1. Place numbers 1-9 into each grid cell exactly like in a classic Sudoku puzzle;
2. Different cages - groups of grid cells indicated by dotted lines;
3. The sum of all numbers in each cage should be equal to the number in the upper left corner;
4. The sum of all numbers of each 3x3 block, row, or column always equals 45;
5. Each cage, row, column, or 3x3 block cannot have the repeated numbers.

Features:

- Turn on the note mode to take notes like solving puzzles on a piece of paper. The memo is automatically updated while you fill in the cell.
- Find your mistakes and challenge yourself or use auto-check to see your mistakes in real-time
- Complete daily challenges and earn special trophies!
- Use free hints when you are stuck.
- Thousands of killer sudoku puzzle games

More functions and highlights:

✓ Statistics. Track your killer sudoku progress.
✓ Unlimited Undo. One tap to remove the mistake.
✓ Autosave. If you leave Sudoku incomplete, it will be saved. Keep playing anytime.
✓ Eraser. Eliminate all of the mistakes if you made any.
✓ Sharing functions. You can share this sudoku game with your friends via Facebook, Twitter, etc.
✓ Four perfectly balanced difficulty levels: Easy, Medium, Hard, and Expert.

Train your brain anytime and anywhere and keep your mind sharp in this Killer Sudoku puzzle game. With its easy control, intuitive interface, and perfect selection of different levels, this killer sudoku app will help you to enhance your logical ability and learn more Sudoku skills. Come and try it out! Challenge yourself how quickly you can solve problems and improve your memory!

We always carefully check all reviews. Please feel free to leave your ideas, feedback, suggestions, or any questions about Killer Sudoku for further improvements! We are always here for you. Thank you and have fun with Killer Sudoku, Sudoku Puzzle!

Privacy policy: https://killer-sudoku.gurugame.ai/policy.html
Terms of use: https://killer-sudoku.gurugame.ai/termsofservice.html
Killer Sudoku Puzzles - train your brain with this number game at any time!
Updated on
Sep 4, 2026
Available on
Android, Windows*
*Powered by Intel® technology
Events & offers

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.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Personal info, App activity and 2 others
  • Data isn’t encrypted
  • You can request that data be deleted

Ratings and reviews

15K reviews
Nigel Hunt
March 27, 2025
Love this game but would it be possible to auto fill in the single cage numbers, if present, at the start of expert level puzzles. Either that or prevent this type of expert puzzle generation. Also how many cross math puzzles need to be played before they become really challenging; I'm up to 380 and still haven't noticed any appreciable increase in the level of difficulty. "Hard" and "Elite" indications seem meaningless.
8 people found this review helpful
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Guru Puzzle Game
March 28, 2025
Hi, thank you for your kind support! We will forward your request to our product team and continue to optimize our game to deliver a better and better gaming experience. Please feel free to reach us at killersudoku@fungame.studio with any feedback. Thanks again! :-) - Lily
Francesca Hughes
April 26, 2023
This game works fine but the colour scheme makes it difficult to see your notes. I've tried the different colour schemes but they're all as bad as each other. Much better on another killer sudoku app I use. Also, "advanced notes" isn't always there, and sometimes you end up tapping the wrong thing if you don't look at the options properly, and then you have to watch an ad before going back to the game. Also, advanced notes aren't great.
9 people found this review helpful
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Guru Puzzle Game
April 27, 2023
Hi, thanks for leaving a review. We have forwarded your all feedback to our development team and product team. Could you tell killersudoku@fungame.studio more suggestions about the "Advanced Notes" as you mentioned? We will continue to update our app to deliver a better user experience. Thanks again! :-) - Fiona
Rin Riker
July 23, 2025
was fine for a while but the ads have started being obnoxious. you get an ad for completing a level, you get an ad for pausing, and you have to watch ads to gain hints, the hints you can "claim" from playing games also has an ad. not only that, within the level itself has an ad! I wouldn't have bothered giving this review if it wasn't for the ads that start PLAYING MUSIC DURING THE GAME. I have sound off in app, and it's frustrating enough I can't mute ads after finishing levels!
23 people found this review helpful
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Guru Puzzle Game
July 23, 2025
Hi, sorry for that. As a startup, we rely on ads. Except for Bonus Video ads, you can skip the ads after around 5 seconds or remove them with a one-time purchase in Settings > Store. For more info, please reach us at killersudoku@fungame.studio. Thanks. - Lily

What’s new

Dear Killer Sudoku players,
This update includes bug fixes and UI optimization.
Share the game with your friends, thank you for choosing Killer Sudoku.