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Duke Nukem 3D Hints
Where's the red card?
1 of 5: The red card will open the door to the exit by the police car.
2 of 5: First, find the hidden lift (activated by the blue key card) and go up into the factory.
3 of 5: Maneuver your way through the conveyor belts, which is not hard, to the main room.
4 of 5: Find the switches on the wall that open up another area (there is one on each side).
5 of 5: The red card is lying by one of the monitors.