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Gorod Krovi
Valve Combinations
286,211 combinations generated so far
Switch the generator on in the Hatchery (PaP) by killing a Valkyrie Drone by the generator. Once the generator is switched on return to the main map and examine all the valves.

The start valve is the valve with the green light above it. The end valve is the valve with the code cylinder stuck in the tube below it.

The Barracks is the room below the Infirmary.