Rezurrection is the only DLC with 5 Zombie maps. all the other DLCs have only a single zombie map.
Verruckt does not have the Pack-A-Punch machine only Der Riese and the Black Ops Zombie Maps (excluding Dead Ops Arcade) have the Pack-A-Punch machine.
The only way to get ascension is by buying the first strike map pack
You do in Ascension zombies from the first map pack for black ops.
no you buy the whole Map Pack or nothing
For the standard WAW edition there are 3 DLCs available for purchase besides the single zombie map included after the game is completed. They each include an additional zombie map that is only available with purchase of the map pack. The modified Black Ops WAW maps are only available on the standard Xbox 360 edition of Call of Duty Black Ops with purchase of the Rezurrection DLC or Map Pack.
The 4 World at war zombie maps and the newer zombie map moon
If you pack-a-punch a gun it wont be crappy
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 bought the hardened edition of Black ops or buy the Rezurrection map pack for black ops
Moon and the 4 WAW zombie mapsRezurrection Map pack has Moon It also includes the 4 WAW Zombie Maps Nacht der Untoten, Verrückt, Shi No Numa, & Der Riese that have been modified for Black Ops and were also available in Hardened and Prestige Editions of Black Ops
Buy the first strike map pack