66%Strong matchSudoku Universe / 数独宇宙
95%3k95% positive reviews, Overwhelmingly Positive across 3k reviews·Puzzle · Relaxing
—Sudoku with an artsy twist. Full-colour hand-crafted Sudoku-Variant puzzles. Probably the prettiest puzzles in all of the world. Slow-Thermo is an easily understood Sudoku variant that pushes digits into the grid. This app includes a Sudoku conflict checker.
Mr Toffee's Slow-Thermo Sudoku Puzzles
SteamMr Toffee saves your progress when you Quit the game. Until our next update, please use Game Menu → Quit (or ⌘Q on Mac / Alt+F4 on Windows) to ensure your latest grid digits are saved. If you close the app via the Steam “Stop/Close” button, the OS may exit the game before it finishes writing a save.
We’re adding a visible Save & Quit button on the home screen and a “save-on-any-close” safeguard soon. Thanks for your patience while we polish this!
Sudoku with an artsy twist. Full-colour hand-crafted Sudoku-variant puzzles.
Probably the prettiest puzzles in all of the world.
Slow-Thermo is an easily understood Sudoku variant that pushes digits into the grid.
Slow-Thermo is quick to pick-up, easily mastered, and highly addictive for the right kind of puzzle lover.
A fun twist on regular Sudoku, great for those who love to hunt and whittle down pencil marks.
This app includes a Sudoku conflict checker. Temporary save note: For now, progress is written when you Quit the game (⌘Q on Mac / Quit from the game menu). Closing via the Steam “Stop/Close” button may not save immediately. A Save & Quit button is coming in an update.
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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The best games like Mr Toffee's Slow-Thermo Sudoku Puzzles are Akin, Sudoku Universe / 数独宇宙, Sudoku Jigsaw / 拼图数独, Sudoku Killer / 杀手数独, and A Little to the Left.
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