Alternatives
Products that do what 63 does
Puzzle solving race against the world!
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Puzzle Lair brings Sudoku, Killer Sudoku, Calcudoku, X-Sudoku, Kakuro, Ripple Effect, Crossmath and Nonogram together in one clean, free site. Solve daily logic puzzles, track your stats and climb the leaderboards.
Jun 2026 · puzzlelair.com
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2018 · mazebattles.com
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2023 · puzzlemoji.com
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2022 · twentyletters.com
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1v1 real-time number puzzle game - Wordle meets multiplayer!
May 2026 · play.google.com
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2022 · mathgrams.com
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6 numbers. 1 goal. Outsmart the puzzle before time runs out
Oct 2025 · play.google.com
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I and my colleagues built this racing game where you write JavaScript code in your browser to race on a Unity WebGL based race track. We'll actually invite the top 5 racers in Finland to run the same code on our actual (admittedly rather kludgy) physical cars, which my colleague built from RC cars and Raspberry Pis. I think the game is super fun. I hope you enjoy it as well!
2023 · race-condition.reaktor.com
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