NN666Trace

NN666Trace is a local, offline puzzle game built around one-stroke network trails.

Each level asks you to cover every edge exactly once while keeping the route alive.
Nodes may be revisited, but lines cannot be used twice. The puzzle grows through
four chapter styles: open-start circuits, fixed-start trails, ordered marker runs,
and one-way paths with arrows.

The game includes 90 fixed levels, a daily challenge that rotates from the built-in
set, a chapter map, progress tracking, favorite levels, undo support, hints, and
clear win and fail reviews. Best times and no-hint clears are stored locally on the
device, so the game stays fully playable without an account or network access.

Use the guide to learn the basic route rules, then choose a level, trace the path,
and refine your route as the network becomes more constrained. Every run is fully
replayable, and every solved level stays available for later practice.