Locker 75 = 184, locker 17 = 575, locker 204 = 971, locker 94 = 490. You have to scan the matching barcode first. The scanner prints the PIN, and a locker won't open until you've scanned its barcode.

Where it is

It's in the CEG Employee Lockers building, Clara Woods Estate ground level (Part 4, Chapter 10). The barcode scanner is on the counter.

All four lockers

BarcodeWhere to find itLockerPINInside
CEG LockersOn the counter by the scanner75184Flare Gun
South Brae5 South Brae safe (floppy disk puzzle)17575Boltcutters + Mechanical Part
North Brae6 North Brae safe (North Brae safe)204971Mechanical Part
Upper Brae5 Upper Brae safe (tape puzzle)94490Mechanical Part

Don't just type the PIN. If a locker won't open, you haven't scanned its barcode yet.

The three Mechanical Parts combine into the device that opens the Strange Gate.

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