Sudoku Atlantis takes you on an epic journey through over 100 Sudoku variations. The puzzles range from easy to hard as your narrator describes the last days of Atlantis. All puzzles are based on the 1-9 logic puzzles of a normal Sudoku, but each puzzle has some variation to it – islands floating in the sea, peaks and valleys where only certain digits can be placed, patches where the digits are taken from the puzzle for you to place back in. Find your way through the mystery of Atlantis as you solve the puzzles.