Un seul trait, toute la grille

1Link Games is the independent mobile game studio of 1LINK FRANCE in Villepinte, near Paris. We design single-line logic puzzles for Android: connect every point on the board with one continuous stroke, without crossing or retracing.

Boards grow from a handful of dots to large maps with bridges, gates and coloured paths. Each new rule arrives on its own, with a short example, so the difficulty rises through understanding rather than speed.

There are no timers and no lives. Any stroke can be undone, and a gentle hint reveals one safe segment at a time. Finished boards stay available to replay, and progress is stored on the phone so the puzzles can be played offline on a commute or in a quiet moment at home.

Each puzzle pack has a theme drawn from places where lines matter: metro maps, embroidery, garden paths and the tiled courtyards of old Paris buildings. The artwork stays calm and readable, with high-contrast colours and shapes that also distinguish paths for colour-blind players, and every text can be read in French or English.

We test every board with people who have never seen it. If most of them reach the answer by trial and error rather than by noticing something, the board goes back to the drawing table. The aim is a small moment of insight on every screen, the feeling of seeing the line before drawing it.

Players who enjoy the puzzles can suggest a theme or send a board they drew themselves; the best ideas are tested in the studio and may become part of a future pack. Our first game is in development. When it is published on Google Play it will be listed on this page together with its own privacy policy, written from the released build and matching its Data Safety answers.