When You complete each condition set here You'll get the allotted Trophies.
Free Labor (Gold) - Completed 'Free Labor'
Unsafe Working Conditions (Silver) - Completed 'Unsake Working Conditions'
Into the Pitt (Silver) - Completed 'Into the Pitt'
Mill Worker (Silver) - Found all 100 Steel Ingots
Fallout 3: The PittMore guides, cheats and FAQS