45		Professor Fuji's Sudoku Deluxe (Windows, 2005)
45		25,000 Sudoku Puzzles (Windows, 2005)
45		PC Sudoku (Windows, 2005)
45		Sudoku Quest (Windows, 2005)
45		Sudoku Total (Windows, 2005)
45		Carol Vorderman's Sudoku (Windows, 2005)
45		Su Doku Master (Windows, 2005)
45		Ancient Sudoku (Windows, 2005)
45		Sudoku (Windows, 2005)
45		Infinite Sudoku (Windows, 2005)
45		Crazy Sudoku (Windows, 2005)
45		Sudoku Mania! (Windows, 2005)
44		Sudoku 60.000 (Windows, 2006)
44		Sudoku, Kakuro & Friends (Windows, 2006)
44		Sudoku (Windows, 2006)
44		Sudoku Crunch for Kids! (Windows, 2006)
43		Hitori Deluxe (Windows, 2007)
43		Big Su Doku (Windows, 2007)
43		Kuromasu Deluxe (Windows, 2007)
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40		Color Sudoku (Windows, 2017)
40		Sudoku86 (DOS, 2014)

Notes: Games similar to Ultimate Su Doku, Games like Ultimate Su Doku, Idigicon Limited, Idigicon Limited, Windows, Puzzle, Top-down, PC, Game Similarities.