Once
si.robin.trace_once
FreeContains adsIn-app purchasesEveryone
Launch numbers
50+Installs
n/aRating
Mar 21, 2026Released
Oct 26, 2026Updated
What it is
Draw one continuous stroke. Cross every line exactly 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 PATHYour stroke crosses the puzzle's lines. Each crossing lights up the board and brings you closer t…