Zombie activator

Is there a zombie activator so you dont first have to play campaign?

Download the latest patches (I think the 1.4 one) and go to level select, and they will all be available.

for PC or console? For consoles update via internet and you can play zombies without campaign. if you have pc donwload the patches in order. so start wwith 1.1 then install it, download 1.2 install it, and do that untill version 1.7 just google the patches. zombies will become available then

Closed to prevent further repeating of answers.