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Half-Life: Opposing Force Hints
How do I get out of the room with three blue pipes?
1 of 6: The pipes loop back and forth between this room and another.
2 of 6: When staggered, they seem to form a sort of makeshift staircase.
3 of 6: Climb up the pipes to reach a vent.
4 of 6: Break the vent and crawl into the air duct.
5 of 6: The first exit vent you come across leads out of this room. Break through and drop onto the ceiling panels.
6 of 6: If you ignore the first vent and keep heading down the air duct, you will come out behind the locked door that you see in the room with three blue pipes. Grab the ammo and health kit.