Use bricks or bottles to lure an infected into attacking a human

Defeat Black Fang without getting hit

Engage in all optional conversations

Win the brick throwing contest

Collect all comics

Break into every locked door using shivs

Find all training manuals

Pet Buckley the dog

Open all safes

Upgrade and then break one of every melee weapon

While in stealth, turn off the spotlight generator in Pittsburgh

Find a comic