Sudoku Siege

Each floor is a sudoku grid: fill every row, column and 3x3 box with the digits 1 to 9, no repeats. The siege twist is a shared life bar, placing a digit that breaks the rules costs you HP. Clear a grid to ascend to the next floor, and push as high up the tower as your logic (and your health) will carry you.

• Fill the grid so each row, column and box contains 1 to 9 once.
• Wrong placements drain your HP, so deduce before you commit.
• Solve a floor to climb to the next, tougher grid.

• Daily, a shared tower seeded the same for everyone each day.
• Practice, endless seeded climbs at your own pace.

• Desktop: click a cell and type a number, or use the on-screen number pad.
• Phone & tablet: tap a cell then tap a number, fully touch playable.

• Only place digits you've fully deduced, a guess that fails costs real HP here.
• Use pencil-mark reasoning mentally on cells with two candidates before deciding.
• Scan for forced singles each floor; they're free, safe progress that protects your life bar.

The grid is sudoku's, a puzzle whose classic form is public-domain logic: digits 1 to 9 in every row, column and box.

Around it sits a roguelike tower — each floor a fresh grid, a shared life bar, and HP lost for every digit that breaks the rules.

Sudoku normally has no cost of being wrong beyond an eraser, which is why guessing is a legitimate if inelegant strategy. Charging HP for a bad placement makes the difference between knowing and suspecting matter, so the tower is really a test of when you are certain.

Sudoku Siege is an original free browser game that turns the classic public-domain number-placement puzzle into a survival tower climb, where a life bar rewards careful logic over guesswork.

A free, original browser game on PlayPendium. No download, no install.