Easter Egg?[]
Inside the room where you find the Crooked Man, you can briefly see a poster saying "This job has worked 0 days without an accident".
Oddly enough, the poster is an almost exact replica of the same poster seen in the game Team Fortress 2 at various locations. (If you still don't believe it, the "0" in the poster is appears exactly the same in both posters.)
Additionaly, if you compare Sheppard Metalworks to Mannworks, a map in TF2, they bear a striking resemblance.