press L2 and R2 few times you will stand up you will get trophy then what you do is go on the coputer write Zork you will unlock another trophy then you type in "3RAC UNLOCK" you will unlock 2 maps for the zombies mode one is five and dead ops acarde but you can also automatically unlock it when finish the campaign but if you want play it early then do it now.

eh?!

you know when you are on the main menu press L2 and R2 few times you will stand up walk to the computer which behind you and write in the computer the 2 codes you will unlock the zombie map called "five" which you get after you finish campaign mode but you can get it before hand then, in dead ops arcarde mode which is zombies as well...... you will get totaly 3 trophies for that

i did that at a friends

they really thought about the game

Cool thanks kumar