Solo
A free Sudoku-based puzzle game with multiple modes, customizable difficulty, and grid variations.
Simon Tatham
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Rectangles
A logic-based puzzle game where players divide grids into rectangles matching numbered area clues, part of Simon Tatham’s Portable Puzzle Collection.
Pearl
Pearl is a free grid puzzle game where you trace a single looping line guided by black corner dots and white straight dots. Inspired by Nikoli’s Masyu, it’s part of Simon Tatham’s addictive Portable Puzzle Collection.
Flip
Flip: Lights Out puzzle where toggling grid squares flips neighbors in cross patterns, with alternate unique-per-square modes for varied challenges.
Towers
Fill the grid with numbered towers, ensuring unique heights per row/column while solving border visibility clues in this customizable puzzle challenge.
Mines
A thoughtfully designed Minesweeper variant with deterministic puzzles and helpful flag notifications.