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.

Whether you’re a fan of the classic sudoku puzzle or just looking for number games or math puzzles to have a great time and exercise your brain, 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, the Killer Sudoku puzzles are great for both beginners and advanced Sudoku solvers. We have no doubts you’ll become a Killer Sudoku master in no time!

What is Killer Sudoku

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

This number puzzle bears 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 the sum of numbers in 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 Killer Sudoku rules in detail below.

How to play Killer Sudoku

✓ Fill all rows, columns, and 3x3 blocks with numbers 1-9 exactly like in sudoku classic
✓ Pay attention to the cages – groups of cells indicated by dotted lines.
✓ Make sure 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. 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 the mistakes in case you made any in the number puzzles.

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