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Half-Life: Opposing Force Hints

Missing in Action

How do I get out of the room with three blue pipes?
The ceiling panels gave away! What do I do now?
How do I get past the working fan units?
How do I walk across the catwalk? Scalding hot steam is blocking my path.

How do I cross the open furnace pipes/vents?
How do I get out of the furnace?
How do I get out of the furnace's maintenance area?

Where do I go in the elevator shaft?
How do I cut the power to the elevator?

The red door on the top floor, just past the elevator shaft, is locked!
How do I get past the barricaded hallway and through the red double-doors?
The path to the second elevator shaft is blocked! How do I reach it?
I hear fellow soldiers nearby, but where are they?
How do I get past the locked elevator door?

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