Free Online Logic Puzzle Games

These games challenge players to use deductive reasoning, recognize patterns, and apply logical rules to find solutions. They're suitable for adults, and many can be enjoyed by kids too. All are free to play online, with no account required.

Clues by Sam

A daily deduction game in which you determine which characters are criminals and which are innocent. Each correct decision may reveal another clue, helping you solve the rest of the grid.

Guessing isn't allowed: every choice must follow logically from the information available.

All/Some

Choose the Euler diagram that correctly shows the “all, some, or none” relationships among four words or phrases.

Three free puzzles are available each day: two based on everyday knowledge and one drawing on subjects like biology, history, mathematics, or art.

Puzzle Baron's Logic Puzzles

A collection of classic logic-grid puzzles. Each presents a scenario and clues. Use a grid to match related items, eliminate impossible combinations, and draw conclusions by combining clues.

Thousands of puzzles are available at different difficulty levels.

Queens

A daily visual logic game from LinkedIn. Place exactly one crown in each row, column, and colored region of the grid, making sure no two crowns touch, even diagonally.

The rules are simple, but finding a solution requires careful thinking.

0h h1

0h h1 (pronounced "oh hi") is a color-based logic puzzle. Fill the grid with two colors so that every row and column contains an equal number of tiles of each color. You can't have three adjacent tiles of the same color, and no two rows or columns can be identical.

Choose from different grid sizes.

KenKen

KenKen combines Sudoku-style logic with arithmetic. Fill each row and column with numbers without repeats. The numbers in each outlined group must also reach a target using addition, subtraction, multiplication, or division.

Puzzles are available at various difficulty levels.

Slitherlink

Slitherlink by BrainBashers asks you to draw a single, unbroken loop along the edges of a grid. Numbers inside certain squares tell you how many of their four sides must form part of that loop.

Daily puzzles come in different sizes and difficulty levels.

The Daily Set

A pattern-recognition game based on the card game SET.

Find six groups of three cards among 12 cards, where each feature—color, shape, number, and shading—is either the same on all three cards or different on all three.

I'm continuing to add to this list. If you know of a free online logic game worth including, email your suggestion to stephanie@critikid.com.