Sudoku Killer / 杀手数独 is a Casual, Indie, Strategy PC game, developed by , available on Steam and published by .
Killer Sudoku (Sumdoku/Mathdoku/Addoku) puzzles include all the rules of regular Sudoku, but add in dashed-line 'cages', which must sum to given values. This great brain exerciser will provide you many hours of new Sudoku experience and be nice addition to your puzzle collection.