No,you need to mod it.
you cant
Zombies are not part of MW2
There is no cheat codes for Call of Duty Modern Warfare 3.
There are no cheat codes that I know of for Modern Warfare 2. http://www.ModernWarfareCentral.com/
There are no "cheat codes"
There aren't any cheats in Modern Warfare 2, there is only modz
there are no cheat codes
Don't cheat, play for fun.
There are no cheats in Modern Warfare 2. Sorry.
Sorry there are none.
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You don't