freegamestoplay.
No downloads. Just play.
PUZZLE · STRATEGY

Chain Reaction Lab.

SCORE0
PERSONAL BEST—
✦LOADING YOUR GAME

Chain Reaction Lab

One spark. A beautiful reaction.

Click or tap any node to ignite it. Use Tab and Enter for the accessible node controls. Arrows show the direction energy travels.

Preparing your game…

Choose your experiment

20 circuits, one daily challenge. Stars save on this device.

✧
Bright idea

Reach 300 points to unlock this local achievement.

THE IDEA

One spark. A beautiful reaction.

An activated node sends energy along its outgoing arrows. A node fires only once. Light every target marked with a star before your sparks run out. Blocked cells have no connections. Undo your last spark, or ask for one hint per attempt.

A tip for your next round

Work backward from a target with only one incoming connection. Branches can share a spark, but one-way gates cannot send energy backward.

WHEN YOU’RE READY FOR SOMETHING NEW

Keep the good times going.

All games