Zen of Sudoku
From Valve Developer Community
- Relax with hand-painted Japanese-styled backgrounds, no timer and lush natural soundscapes.
- Stimulates your brain to keep it healthy and alert.
- Teaches you the basics of Sudoku through advanced strategies like "naked pairs", "x-wing" and "locked candidates".
- Play unlimited puzzles, print them to finish offline and enter custom puzzles from other sources.
- Unlock trophies, backgrounds and more.