Objective & controls
Choose a valid starting point and trace the required connections as one continuous route until every required segment is covered.
Level1 / 20
Visited0 / 9
Undos0
Resets0
Time00:00
Best—
Tap a visited node to roll back to it.
Start from the highlighted node.
Validated puzzlesEvery level has a fixed start and at least one verified complete route.
Never get stuckDead ends and blocked routes are detected automatically. Roll back to any visited node or clear the path.
Global leaderboard
Highest completed level · then fastest cumulative timeGuest playYour level checkpoints are kept during this run. Sign in to put them on the leaderboard.
Sign inHow to play One Line
One Line is a continuous-path graph puzzle where the figure must be completed without breaking the route. Play instantly in your browser—no download is required.
How scoring works
Progress and route efficiency contribute to the result; the key is not stranding an unfinished part of the graph.
Strategy
Inspect nodes with few available connections first. Those constrained nodes often reveal good starting or finishing candidates.
How difficulty grows
More complex graphs introduce tempting routes that consume a connection needed later, increasing topological difficulty
More games like One Line
Try another Small Games title that exercises a related skill.
Try the Daily ChallengeOne official challenge each day. Play the same challenge as everyone else and compare your result.
Play today’s challenge →Improving at One Line
The useful way to improve is to understand what the game is measuring. In One Line, the important pressure comes from More complex graphs introduce tempting routes that consume a connection needed later, increasing topological difficulty. That means repeat runs are not only attempts at a better number: they are opportunities to recognize the decisions that create that number. Use the strategy above as a starting point, then compare your own runs and identify where time, accuracy, moves or survival are being lost.
Small Games keeps the rules visible because a leaderboard is only useful when players understand what is being compared. Read how scoring and verified results work, browse the complete Game Guides, or learn how Small Games is designed.
Frequently asked questions
Can I play One Line for free?
Yes. One Line is free to play in the browser on Small Games and does not require an app download.
Do I need an account?
No. You can play as a guest. Sign in when you want eligible results, personal bests and competition progress associated with your profile.
Can I challenge someone else?
Yes. Use the Share or result-sharing controls to send a Small Games link or challenge. The recipient can open the game and compare the result where supported.
What should I play next?
Use the related games above, browse game categories, or play the Daily Challenge.