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Signal Sweep

Read Yuki Rae's survey grid and isolate the unstable signal nodes.

Updated August 20, 2026

Where to find it

Signal Sweep is at Yuki Rae's signal lab in Nova Reach, kept by Yuki Rae.

How to play

  • Each revealed cell tells you how many unstable nodes touch it. That number is the whole puzzle.
  • Flag the cells you have proven are unstable and open the ones you have proven are safe.
  • Clear every safe cell to complete the sweep.

Worth knowing

  • When a cell's number equals the number of unopened neighbours, every one of those neighbours is unstable. When its flags already equal its number, every remaining neighbour is safe.