Find all training manuals

Find all workbench tools

Pet Buckley the dog

Open all safes

Survive all of Ellie's jokes

While in stealth, turn off the spotlight generator in Pittsburgh

Find a comic

Find one training manual

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

Defeat Black Fang without getting hit

Win the brick throwing contest

Manually Tranquillise a Dinosaur or reptile