Helping the Cepheids

Nested hint: I'm supposed to help the Cepheids escape, but where are they?
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Nested hint: I just heard that one of the generators has been fixed.
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Nested hint: I tried to get into the tunnel, but something tried to kill me!
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Nested hint: How do I get past this killer robot?
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Nested hint: What should I do after destroying the robot?
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Nested hint: I thought I dismantled the generator, but it's still working!
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