Lights Out

Toggle lights in a cross pattern to turn them all off.

Rules

• The grid starts with some lights on and some off.
• Toggling a cell flips that cell and its four orthogonal neighbors (up, down, left, right).
• Cells on edges and corners have fewer neighbors, so fewer lights flip.
• The goal is to turn every light off.

Controls

Keyboard

Key	Action
Arrows / wasd / hjkl	Move cursor
Enter / Space	Toggle light
Ctrl+H	Toggle full help
Ctrl+R	Reset puzzle
Escape	Return to main menu

Mouse

Action	Effect
Left click	Toggle light (and its neighbors)

Tips

• Toggling the same cell twice cancels out. Every move is its own undo, so if you make a mistake, just press the same cell again.
• Work row by row from top to bottom. Turn off all the lights in the current row by toggling cells in the row below it, then move on. This keeps solved rows from getting scrambled.
• Plan around edges and corners. Corner cells only affect two neighbors and edge cells only affect three, which limits your options. Tackle these constrained areas first when you can.