Chain Reaction Lab

About this game

Chain Reaction Lab is a slow, thoughtful lab puzzle where you place relays, splitters, boosters, and arrows on a grid, then launch a spark that must travel piece to piece to the golden star. With 40 handcrafted labs plus a new date-seeded daily lab, it is one of the calmest puzzle games for players who like to think before they tap.

How to play

1. Tap a tray piece, then tap an empty grid cell to place it.
2. Relay fires in all four directions, Splitter fires diagonally, Booster jumps over one cell even over a wall, and Arrows fire one way only.
3. Press Launch Chain and watch the spark travel piece to piece from the glowing orb.
4. Reach the golden star to light the lab. Undo and Clear are free, and Hint places one correct piece.
5. Play Daily for the same lab every player gets that day, Free Run through all 40 labs, or Relaxed mode with unlimited hints.

Tips

• Start from the star and work backward toward the orb.
• A Relay next to a wall wastes a direction, so save Relays for open ground.
• Boosters are the only way across a wall row, so plan jumps before you spend them.
• If a chain stops short, lift the last piece and try the route one cell over.