I like the premise. If I could offer some proof-reading:
- I think you could use a space between 'gutter job' and 'because' on the far right column of the first page, under warden's notes.
- Under Routes, Factions, and NPCs you say 'go the corporal way', when I think you mean to say 'corporate'.
- In the monster statblock, you don't need to the % sign next to combat and instinct.
- Capitalizing things like Sanity Save and Panic Check will help things look more standard.
- Under Detention Cells, you say 'While he don't remember the details of his escape'. Perhaps you mean 'doesn't' or 'won't'?
Other than that, my only critique is that I wish there were more mines! Some twisty tunnels and a cave-in could really make this thing pop.