theres a guy in the engineering place with a whole storyline, I think his name is alex, and a bit in you can ask him to unlock it
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Alex's story is unlockable after you talk to him again in the mines (in the tile you work in). You can skip the portal panties content to unlock it faster. From there, you wait by him enough over the corse of a few days until he trusts you enough to let you help him and borrow a pad to hack the cage.