How was it?
What the publisher says about Fill Line : one line puzzle game
Looking for a way to sharpen your mind and relax at the same time? Welcome to Fill: One Line Puzzle Game, the minimalist brain teaser that’s taking the world by storm. The rules are simple: connect all the squares on the grid using a single, unbroken line. It sounds easy, but as the grids grow and the paths become more complex, you’ll need every bit of logic and spatial reasoning to find the solution. Why You’ll Love Fill: Thousands of Levels: From beginner-friendly 4x4 grids to expert-level challenges. Daily Brain Training Minimalist Design No Time Pressure Stuck? No Problem
Controls, as supplied: Start at the designated block Drag your finger to fill all the remaining blocks The Catch You cannot overlap lines or revisit a block you rsquo ve already filled
Those are the studio's own words, reproduced as we received them and not checked by us. The feed occasionally describes a different game altogether, so treat it as a starting point rather than a fact.
We have not written about Fill Line : one line puzzle game ourselves yet. Every game we cover is taken apart and played first, so this page waits until that happens. The game above works either way.
Game details
- Developer
- Fill Line
- Added here
- December 2025
- Technology
- HTML5
- Platforms
- Browser (desktop)
- Download size
- 19 MB
- Ad requests
- 2 (few)
- Has a save
- Yes
- Built with
- Unity 2020.3.48f1
- Saved progress
- Kept by the game itself, in this browser on this device. It survives closing the tab and coming back, but it does not travel to another computer or phone, and clearing your browsing data erases it.
Measured by opening the game ourselves on 2026-09-11, not taken from the feed. Twelve seconds on a phone-sized screen, with ad requests counted and blocked rather than loaded.
Read out of the game’s own build, not taken from the feed. Counts come from the project file: levels are layouts named as levels, sounds are the audio files it ships with.
