Power Lines begins after Arish's Briefing. Reroute Perimeter, East Park and Factory stations in any order, then complete the Vanished Station. The first three puzzles use movable calibration units; the last also requires shifting electrical charges so Mold stops covering the placement squares.

Perimeter: nearest and farthest squares

Put one unit in the square nearest the tuning device and the other two in the farthest squares, up the north and south stairs. One unit is up the northern stairs, another is in the Mold-covered southern track area, and the third is behind a power requirement.

To reach that third unit, hit the charged core up the southern stairs and carry its charge to the unpowered core on the northern tracks before it expires. Retrieve the unit, place all three and activate the device. If calibration fails, inspect the occupied squares before repeating it.

East Park: let the device move you

At the station's first junction, take the loose unit on the right; the left-side unit is behind a gate. Put the two accessible units on platform squares and activate the device three times. The third activation moves you into the gated room. Hit the red-lit electrical box to open the gate, bring the final unit out, fill the remaining square and activate the device again.

The apparent failed activations are part of retrieving the missing unit. Speak over the intercom when the conversation becomes available.

Factory: fill the intervening squares

Find Factory Station northwest of the Patterned Factory. Take the first unit from the shop near the entrance and place it at the bottom of the stairs. The other units are on the western subway car and behind the southern stairs. Their squares lie between the stair-bottom unit and the main tuning device. Activate once all three are positioned.

Vanished Station: clear the squares without regrowth

Follow the southern tracks toward the missing team. The new station has Platforms A and B, and the tuning device moves you between them. Read the local notes: electricity attracts Mold, and floodlights accelerate its growth.

For Platform A, move through the connecting corridors, use the red-lit electrical box to open the metal door, and carry a calibration unit back to the square near the stairs. Move the relevant electrical charge upstairs, break the Mold over the other required square, place the second unit and activate A.

For Platform B, transfer both platform-core charges to the upstairs cores. Bring the remaining unit down from the survivors' room. With the platform cores no longer feeding the growth, destroy the Mold over the two side squares, position the units and activate B. Clear the enemies and talk to Dr. Florez to finish.

When a transfer keeps failing

Electricity has a travel timer; deposit and collect charges along the route instead of assuming they last indefinitely. If Mold regrows over a placement, inspect which nearby cores remain powered. For the exact corridor sequence, Dan Allen Gaming's station walkthrough follows the same four-station solution.