Sudoku Offline is a complete, ad-free sudoku game you can play anywhere - no internet, no wifi and no sign-up needed. Classic 9x9 sudoku puzzles, 8 puzzle types and a new daily sudoku challenge every single day. Every puzzle here is checked to have exactly one solution, so you never hit a dead end or have to guess your way out. CLASSIC SUDOKU, FOUR DIFFICULTIES Play classic 9x9 sudoku in Easy, Medium, Hard and Expert. Easy sudoku for a calm five minutes on the sofa, expert sudoku when you want a real brain workout. The difficulty curve is tuned by hand, so medium actually feels like medium and hard sudoku actually fights back. 8 PUZZLE TYPES - Classic Sudoku - the timeless 9x9 number puzzle - Killer Sudoku - sudoku where sums meet logic, with cages instead of given digits - Jigsaw Sudoku - irregular shapes instead of the usual 3x3 boxes - Windoku and X (Diagonal) Sudoku - extra regions, extra thinking - Mini Sudoku - quick 6x6 grids for a short break - Star Battle - a l...