JGOWorlds to explore

Light Up

Place bulbs to light every open square on the board.

Available External game
Golden bulbs and numbered walls on a midnight-blue grid beneath the Light Up title.

The game world

Discover Light Up

Each bulb shines along its row and column until it reaches a wall. Light up every open square while keeping bulbs out of one another’s beams. A number on a wall tells you how many bulbs touch it along an edge. James Harvey contributed this adaptation of Nikoli’s Akari to Simon Tatham’s collection.

Original wordmark and artwork by JGO.

Your adventure starts here.

JavaScript and WebAssembly. The official site documents Chrome, Firefox, Safari and Edge.

Open Light Up