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Half-Life: Opposing Force Hints
How do I get out of the area with the caged-up ichthyosaur?
1 of 6: I know it sounds crazy, but you are going to have to free that ichthyosaur if you expect to find some form of exit.
2 of 6: To do so, hop out of the water and work your way down until you come to a room with windows looking out into the ichthyosaur's "cage."
3 of 6: There is a hand-wheel at the far end of the room. Turn it to open up the grate barring the animal from exiting.
4 of 6: Be sure that the ichthyosaur makes it out of its "cage" before you try anything. You don't want to be caught in a tight, underwater room with it.
5 of 6: Run back and jump in the water. Try and ignore the ichthyosaur as you make a mad dash for the open grate. Don't look back until you've made it to safety.
6 of 6: At the end of the underwater room is an airlock. Move into it and turn the nearby hand-wheel to close the lock and drain the room.