Royal Reason is a number and color logic puzzle game for fans of Sudoku and grid-based brain teasers. Fill each board using three connected rules: every number appears once in each row and column, every color appears once in each row and column, and every number-color pair appears exactly once across the board.

Start with a 3x3 puzzle and learn the rules through interactive lessons. Move on to larger 4x4 and 5x5 grids, where each number and color gives you another clue. Every puzzle has one verified solution and can be solved through logical deduction.

CHOOSE YOUR CHALLENGE
• Campaign: learn the foundations, progress through increasingly challenging stages, and earn crowns for solving without hints.
• Free play: generate fresh number and color puzzles with difficulty options from Easy to Nightmare.
• Daily puzzles: solve a new challenge each day, build your streak, and revisit puzzles in the archive.
• Weekly challenges: tackle a tougher Nightmare puzzle each week.
• Joker mode: test your accuracy with limited lives and unlimited retries.

HINTS THAT EXPLAIN THE LOGIC
Understand the next deduction with explanations and highlighted clues. Hints show why a move works. Use undo, review conflicts, and return to a saved puzzle whenever you want.

PLAY OFFLINE
Campaign, free play, daily puzzles and weekly challenges work without an internet connection. Progress is saved on your device, and no Royal Reason account is required. Google Play Games sign-in is optional for syncing achievements.

CLEAR BOARDS AND FLEXIBLE DISPLAY
Distinct symbols help you tell colors apart. Choose light or dark appearance and high-contrast options, with layouts for phones and tablets.

OPTIONAL ADS AND PURCHASES
All puzzle modes are available without a purchase. You receive a daily hint allowance and can choose to watch a rewarded ad for an extra hint when available. Royal Supporter is an optional one-time purchase that unlocks unlimited hints and disables ads.

An internet connection is required for ads, purchases and online achievement synchronization.