One Line - Puzzle logique

One Line - Minimalist Logic Puzzle

Draw a single line that passes through every square of the grid.

One Line is a logic puzzle game that's easy to understand but increasingly difficult to master. Choose a starting square, draw a continuous path, and figure out how to visit each square exactly once.

🧩 Simple rules, deep puzzles

Each level requires you to solve a grid in a single continuous line. The first puzzles are learned in seconds, then new constraints transform each grid into a true logic challenge:

• Directional arrows: some squares dictate a specific entry direction
• Walls: barriers block your path
• Inactive squares: holes change the shape of the grid
• Final squares: some levels require a precise arrival point

Each mechanic is easy to grasp, but their combinations create varied, elegant, and satisfying puzzles.

⭐ 300 Official Levels

Progress through the official One Line campaign with 300 handcrafted levels, spread across multiple worlds and 4 difficulty levels:

• Easy: Learn the basics
• Normal: Master the arrows and walls
• Hard: Solve more complex puzzles
• Expert: Take on the toughest challenges

Complete a level to earn a gold star. Master all the levels in a world to earn its platinum star.

🏆 Daily Challenge

A new timed challenge awaits you every day.

Complete a series of levels as quickly as possible, improve your time, and compare your results on the leaderboards.

• A new series every day
• Medals based on your total time
• A daily streak to maintain
• Bonus hints to unlock
• Times to compare with other players

Just a few minutes is all it takes to try and beat your record.

Multiple Paths Possible

Some levels hide more than one valid solution. One Line remembers the unique solutions you discover, allowing you to revisit your favorite levels and find new paths.

📴 Playable Offline

Your progress is saved locally. The game remains playable offline, without requiring an internet connection.

An optional account allows you to sync your progress and more easily participate in leaderboards.

Need a Hint?

Stuck on a difficult puzzle? You receive 10 hints per day to reveal part of a solution and continue progressing without spoiling the entire puzzle.

Features

• 300 official levels
• Multiple worlds to master
• 4 difficulty levels
• Daily timed challenges
• Leaderboards
• Locally saved progress
• Optional account syncing
• Gold and Platinum Stars
• Saved alternate solutions
• 10 daily hints
• Minimalist dark interface
• Smooth animations
• Offline playable
• Ad-free
• No in-app purchases

One line.
All the squares.
How many worlds can you master?