You need to purchase the map pack yourself. The new map packs doesn't involve in only Zombies, it has multiplier maps also.
No the Black ops and world at war map packs come with one zombie map and 4 other maps and you must buy them that way. The 4th and last Black Ops map pack Rezurrection does come with 5 Zombie maps because it includes the 4 WAW Zombie Maps and the Zombie map Moon
no you buy the whole Map Pack or nothing
Buy the first strike map pack
Complete the third zombie stage! or buy the map packs.
Buy the Rezurrection Map Pack
For world at war you buy map pack 3 and on Black ops you buy the prestige or hardened edition of the game.
if you bought the hardened edition of Black ops or buy the Rezurrection map pack for black ops
The best zombie map on black ops is the Call of the Dead but really its your personal opinion
You had to either buy the prestige or hardened edition of the game to get the maps.
No you have to buy them in Map Packs for $15 for the First Strike, Escalation , or Annihilation DLCs available only for the PS3 PC and Xbox 360. They include a single zombie map and 4 multiplayer maps in each DLC for the $15
When you buy Revolution, the first black ops 2 map pack, it comes with a new game mode called turned, which is a gun game styled game where you play as the zombie.
If you want to buy the map packs go to multiplayer, playstaion network, store and then click on either map you want to buy each map pack includes at least 1 zombie map and at least 3 multiplayer maps.