If u want to get MW2 title on online u reach lvl 5 or sumthing after u prestige TWICE!
No, call signs were not introduced until Modern Warfare 2.
Yes, there is online multiplayer on Call of Duty 4: Modern Warfare.
U go to multiplayer if no multiplayer u beat
Call of Duty World at War, Modern Warfare, Modern Warfare 2, Black Ops, and Modern Warfare 3 all have online multiplayer.
Yes You Can
Unfortunately no, you can't play multiplayer on Call of Duty Modern Warfare 1 or on Call of Duty Modern Warfare 2 on the same screen. But on Call of Duty Modern Warfare 3 and Call of Duty Modern Warfare Black Ops you can play multiplayer on the same screen. There is an new Call of Duty Black Ops 2 coming out soon though, so I expect that to also have that feature, since its newer.
There are a total of 70 levels (ranks) in Modern Warfare 2 Multiplayer.
Sadly no.
No you can't.
no because once you go online you will start back from level 1. no emblem, no callsign, no unlocked guns.
no, but there is call of duty reflex, a remake of CoD4 with multiplayer.
No. There is only Nintendo WFC.