yes u do. offline mode only alows u to choose from some pre-set classes
No. but you can play call of duty blacks online on a PC
yes
The Call of Duty wikia is a site
No each of the Call of Duty games follow a unique story line and do not need to be played in order to understand the story or characters. But if I had to recommend your first Call of Duty game I would say play Call of Duty 4 Modern Warfare.
There are zombies attacking. Protect yourself.
no you dont unless you want to play on line.
This really depends on your parental settings (If you have them on). If you don't then yes, just like any other call of duty.
You can not. Call of Duty Zombies is not an Online style of game. It is either a PC or a console game titled Call of Duty Black Ops or Call of Duty World At War. There is also a iPhone version of the game. The game must be purchased and for many of the zombie maps you must also purchase the DLC for the Zombie Map.
No, Call of Duty: Black Ops doesn't continue the story line from Call of Duty: Modern Warfare 2. Those two games are set in entirely different eras.
Many players of the game Fortress 2 dislike the game play of Call of Duty because of the story line and the plots of the COD series.
It will be released November 8 2011 and is available for preorder If the creators of Call of Duty Modern Warfare 2 decide to continue their current line of modern First Person Shooters, then yes there might be a Call of Duty Modern Warfare 3.
Except for on-line, you can't.