I'd like to know the same thing. Someone please give us answers. Thanks!
you don't. you have to buy them
In Call of Duty: Black Ops 3 Zombies, maxing out all weapons does not directly grant any special rewards or unlocks. However, leveling up weapons contributes to your overall progress and can help unlock attachments and camos for those weapons. Additionally, achieving high levels in Zombies can lead to Prestige and other in-game accomplishments that enhance your gameplay experience.
Tap the triggers on consoles and go to the terminal and type 3arc unlock...or bear campaign
all you have to do is unlock all the puzzle mode levels in plants vs zombies
3arc unlock - To unlock the nazi zombies map "five".3arc Intel - To unlock all enemy Intel. WARNING DISABLES ONE ACHIEVEMENT.
If mw1 means Modern Warfare One or CoD 4 then the answer is you can't. But you can get CoD 4 weapons on the PC version of Nazi Zombies for CoD 5.
You don't do missions to unlock weapons you unlock weapons by leveling up.
You HAVE to LEVEL up and BUY them with COD points.
To unlock all the Call of Duty Black Ops weapons you must do numerous things. First, you have to rank up in order to purchase the weapons. Next, you must purchase the weapon with your COD points you gained in-game. There are some classified weapons that are available in the menus. To unlock that specific weapon for purchase, you must purchase all the weapons in that category in order to purchase that weapon. Example: There are 4 snipers and one is classified. Purchase all 3 snipers and the last one will be un-classified.
If your talking about typing codes into the computer when you break out of the chair at the main menu, these are the codes: Unlock Dead Ops Arcade in Zombies: 3arc_DOA Unlock all Zombie Maps: 3arc_unlocks
The codes are all one time use for old zombies maps.
After you unlock all the guns from one class of guns like LMG's then you get a classified weapon.