Play a round of sudoku vs a friend (hotseat/splitscreen). Whenever a player puts a wrong number, the opponent gets a free number. Of course, 1player mode is also included.
Singleplayer is just a round of normal sudoku.
Vs Winner is the first who finishes 3 Sudoku boards.
P1 WASD, Number keys
P2 Arrows, Numpad
Space/Return for menu.