Sudoku Killer is a strategy game developed by Konstructors Entertainment for Windows. It is a logic-based, combinatorial number-placement puzzle that includes all the rules of regular Sudoku but adds a wicked twist. In addition to placing each of the numbers 1 to 9 into each of the rows, columns, and bold-lined 3x3 boxes, you must also place the numbers into each dashed-line cage so that they add up to its given total - without repeating a digit in a dashed-line cage.

The game offers 100 killer Sudoku puzzles, and the progress of each level is saved. Sudoku Killer boasts of a beautiful minimalist design, with multiple color themes to choose from. The game also includes 10 ambient relaxing soundtracks to help you focus while playing. Steam Achievements, Trading Cards, Badge, Emoticons, and Backgrounds are coming soon. Cross-platform Steam Cloud saves are available, and the game supports Windows, Mac, and Linux.