you bet it does!
Yes it is
Modern Warfare 2 (mw2) is rated m for MATURE.
No because , the multiplayer maps for mw2 are designed to stop camping and it works also they are great maps.
Im pretty sure Mw2 is better because i have both and mw2 has a better multiplayer. Mw2- 9 out of 10 Cod4- 8.5 out of 10
no, there all legitimate people.
Nope
On multiplayer, it is unlocked at the start.
No, only that saved game.
No, multiplayer stats are stored on the server.
No, But there is a spec ops type thing which is like campaign but is muliplayer.
No definitely not. Multiplayer FTW
no but there isn't much blood at all it is just used as an indicator or how close to death you are also the language is only a big problem in single player mode so just play multiplayer