Simply do all the challenges, although there are hidden ones which i am not sure about such as 'Radiation Sickness' which gives you the title 'Toxic' but other thatn that i am not sure,,, yeah so do all the challenges and you will get the majority of the titles :D
modern warfare 2
By reaching 2nd Prestige, Level two
Yes the Full title is Call of Duty Modern Warfare 2 and it is often called MW2 or Modern Warfare 2
bgjnb
No it actually means Call of Duty Modern Warfare 3 the full title of the game.
No and the Game's title of the November 2007 release is Call of Duty 4 Modern Warfare. If there is a Modern Warfare 4 which is doubtful since there are title confusing problems as a result of the number 4 being used in the name in the first game of the Modern Warfare series it will be released in November 2013
Unlock the challenges for them.
You have to prestige and then get level 69.
cmplete challanges
Call in 5 nukes.
Kill Soap
Call of Duty 4 Modern Warfare was released in November 2007 and there may be title confusion if their is a release of Call of Duty Modern Warfare 4. There will not be a new release of the Modern Warfare series until November 2013. They (Activision and Treyarch) just announced the release of Call of Duty Black Ops II for November 13 2012