All games
Logic
Lights Out
Turn a bright idea into a dark board.
A little challenge awaits.
5 min · No account. Just you and the game.
Stay on this page during your run.THE SHORT VERSION
How to play
Each switch toggles itself and its orthogonal neighbors on a 4×4 board. Work toward an entirely dark grid in this reversible logic puzzle.
- Tap a tile to flip it and its up, down, left and right neighbors.
- Turn every light off. Every generated board has a solution; tapping a tile twice cancels that move.
- Your best stays on this device. Share a seeded challenge with a friend; a solved run beats an unfinished run, then points and time decide.
A few useful details
How do I complete Lights Out?
Turn every light off. Every generated board has a solution; tapping a tile twice cancels that move.
How long is a Lights Out round?
5 min. The timer and current objective are shown while you play. You can start a fresh run whenever you like.
Can I play free and challenge a friend?
Yes. No account or download is needed. After a run, share its challenge link so your friend gets the same seeded setup. Your personal records stay on this device.