It's a nice night out in Philly, eh? Wrong, danger is lurking around every corner.

You notice the corpses of a few Tankmen, and decide to follow the trail of blood that lead from them. Bad Choice.

You stumble across Pico, throwing a grenade from hand to hand. And he's corrupted.

"You." "Have ya' seen a Mearest chick running around?" "She's corrupted like most of us." Pico had his dual uzis mounted on his back, and he wasn't planning to use them.