Although it depends on how
much zombie slaughter is engaged in and how many side missions are crossed off, most players will hit level 40 during the main campaign, and by that stage Nick is a strong, nimble, corpse - destroying beast of a man.
However, the focus remains on discovery; players must do
much more than
slaughter legions of
zombies, such as enabling an escape - tube network, powering up generators, unlocking a weapon power - up station, finding clues hidden in paintings, and more.