Killer Sudoku Free is a fun and challenging number puzzle game that will put your logical thinking skills to the test. With thousands of puzzles to solve, this new killer sudoku game is perfect for anyone looking to train their brain and have some fun at the same time. And now, with the addition of a new dark theme, color theme, and casual mode, playing this game has become even more exciting and enjoyable. Similar to classic sudoku, the goal of Killer Sudoku is to fill the grid with numbers. However, unlike traditional sudoku, you must also make sure that the sum of numbers in each cage (areas surrounded by dotted lines) is equal to the number in the upper left corner of the cage. This adds an extra layer of challenge and makes the game more interesting. If you enjoy playing number games or math puzzles, then Killer Sudoku is the perfect game for you. It combines elements of sudoku, KenKen, and Kakuro to create a unique and engaging gameplay experience. And with different difficulty levels available, both beginners and advanced players can enjoy this game. To play, simply place numbers 1-9 into each grid cell, making sure to follow the rules of the game. You can also turn on the note mode to take notes and track your progress. And if you make a mistake, don't worry - there are undo and hint functions to help you out. Other features of Killer Sudoku include daily challenges, statistics tracking, unlimited undo, and the ability to share the game with friends. With its easy controls, intuitive interface, and perfectly balanced difficulty levels, this game is a great way to keep your mind sharp and improve your logical abilities. So why not give it a try and see how quickly you can solve these killer sudoku puzzles?