Fill Line : one line puzzle game

Grid puzzles ask you to connect every square on the board with one unbroken line. The paths grow more complex as you progress.

How To Play Fill Line : one line puzzle game

Start at the designated block, then drag your finger to fill all remaining blocks.

Controls and Features

You cannot overlap lines or revisit a block you've already filled. Thousands of levels range from beginner-friendly 4x4 grids to expert-level challenges with daily brain training.

Tips

Plan your route before dragging so you never revisit a filled block. Leave the hardest-to-reach squares for last to avoid dead ends.

Fill Line : one line puzzle game FAQs.

Q: How do I control the game? A: Start at the designated block and drag your finger.
Q: What is the objective? A: Connect all squares on the grid using a single unbroken line.
Q: Are there multiple levels? A: Yes, thousands of levels from 4x4 grids to expert challenges.
Q: What is the main mechanic? A: You cannot overlap lines or revisit an already filled block.