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Half-Life: Opposing Force Hints
How do I get past the purple laser that blocks the stairway?
1 of 9: First, you have to get past the green laser by crouching and moving under it. (Also, keep right to avoid decapitation.)
2 of 9: Read some of the signs on the wall.
3 of 9: One of the signs warns that the mirrors are very fragile and should not be broken.
4 of 9: Notice that the purple laser is being reflected by several mirrors.
5 of 9: By breaking one of the mirrors, the laser might not be reflected across the stairway, and you could get out.
6 of 9: One mirror in particular is quite fragile and can be broken. The others cannot.
7 of 9: The circular mirror, the one that is the last mirror the laser hits before it is shot across the stairway, can be broken.
8 of 9: Move up to the mirror carefully and use the pipe wrench on it.
9 of 9: The entire laser system will self-destruct and you will be able to climb the stairs.