One Line: Logic Puzzle

One Line — Minimalist Logic Puzzle

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

A simple concept, easy to learn, and increasingly challenging puzzles.

One Line is a minimalist logic game designed for lovers of elegant and satisfying puzzles. Choose a starting square, draw a continuous path, and figure out how to visit each square exactly once.

ONE SIMPLE RULE, DEEP CHALLENGES

Each level requires you to solve a grid using a single continuous line.

The first puzzles can be learned in seconds. Then, gradually, new constraints transform each grid into a true logic puzzle:

• Directional arrows — some squares dictate an entry direction

• Walls — barriers block your path

• Deactivated squares — holes alter the grid's shape

• Final squares — some levels require a precise arrival point

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

300 OFFICIAL LEVELS

Progress through the official One Line campaign across 300 handcrafted levels.

The Introduction Pack guides you from the first grids to the most challenging puzzles, spread across multiple worlds and 4 difficulty levels:

• Easy — learn the basics

• Normal — master the arrows and walls

• Hard — tackle more complex grids

• Expert — take on the toughest challenges

Each level you complete earns a gold star. Complete all the levels in a world to earn its platinum star.

⭐ New levels and packs will be added regularly to extend the experience.

MORE THAN ONE SOLUTION

Some levels hide multiple valid paths.

One Line remembers the unique solutions you discover, allowing you to revisit your favorite levels and explore new routes.

🏆 DAILY CHALLENGE

A new challenge awaits you every day.

Complete a series of levels as quickly as possible:

• 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 are all it takes to try and improve your record and ranking.

LEADERBOARDS AND SYNC

Create an optional account to save and sync your progress.

Logged-in players can appear on leaderboards and compare their performance, especially in daily challenges.

The game remains fully playable offline.

NEED A HINT?

Stuck on a tough puzzle?

You receive 10 hints per day to reveal part of a solution and keep progressing.

FEATURES

• 300 official levels

• Multiple worlds to master

• 4 difficulty levels

• New levels added regularly

• Timed daily challenges

• Leaderboards for logged-in players

• Progress saved locally

• Optional account syncing

• Gold and Platinum Stars

• Saved alternative solutions

• 10 daily hints

• Minimalist dark interface

• Smooth animations

• Playable offline

• No ads

• No in-app purchases

🧩 One line.

🏆 A new challenge every day.

⭐ 300 levels today, and even more to come.

How many worlds will you be able to master?