This should help. http://callofduty.wikia.com/wiki/Callsigns
No, not at the moment. Hopefully there may be some time in the future...
No, but the game mode "Special Ops" is 2 player co-op.
594 Titles
to get titles and emblems on modern warfare 2, you have to complete the challenges in the barracks, but for some you have to prestige
Complete challenges in the Barracks.
Yes you can
you get to be clank i belive 4 or 5 times if you have modern ware fare 2 or call of duty 5 or even just modern war fare add me on playstaion net work my user name is hamtinite yes i know very wierd name.
challenge lobby
Modern Warfare 2 is rated M.It has yet to be rated, but COD4:Modern Warfare and COD:World at War, the two most recent titles in the series, have been rated M by the ESRB so this will likely be Moder Warfare 2's rating as well.its rated M for Mature
You must complete different challenges (Note:You dont have to be online to aquire levels or titles)
Complete challenges and level up.
2 or more