Once

A few points. A shape. One continuous stroke.

ONCE is a minimalist logic puzzle about finding a route through a geometric board. Draw across every line exactly once, keeping your stroke clear of the points. A simple triangle can teach you the idea. A more intricate shape can make you stop and look again.

PLAN YOUR PATH

Your stroke crosses the puzzle's lines. Each crossing lights up the board and brings you closer to a complete solution. Cross a finished line again, touch a point or slide along a line, and the attempt ends. Keep drawing until every line has been crossed.

FIND YOUR FLOW

Work through 1,000 campaign puzzles, from spare geometric forms to layered patterns that take a little more thought. Learn the rules in a playable tutorial, then find a route of your own.

MAKE A LITTLE SPACE TO THINK

Clean shapes, clear feedback and a choice of dark or light theme keep the board easy to read. Adjust sounds and vibration to suit the way you play. Daily challenges offer another puzzle to work through, with monthly trophies to mark your progress.

One stroke. Every crossing counts.