Dood : The Puzzle Planet - A strategy puzzle game for the smart ones
Word Square - Sudoku, but with letters and words.
The Costumemaster - A puzzle game where you switch costumes to escape
SudoKoi - Your next favorite pastime, like Sudoku
CNTR - A platformer where you got to escape the circuit labyrinth
UsDoku - Play real-time multiplayer Sudoku.