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Half-Life: Opposing Force Hints

Crush Depth

Where do I find someone to access the Level B retinal scanners?
How do I free the underwater scientist?
The retinal scanner has malfunctioned! How do I get into the next room?
How do I use the large teleportation device?

How do I get out of the area with the caged-up ichthyosaur?
How do I turn off the gamma ray that is shooting across the hallway?
How do I deal with the powerful shocktrooper that teleports in?
Where do I go in the watery room with the broken walkway?

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