You can't, modern warfare 2 has only one player online but it has splitscreen which is only local play.
Chat with our AI personalities
The player cannot put their hands up in Modern Warfare 2 and even if they could could the enemy may still kill the player anyway. Only Non-Playable Characters at scripted events can put their hands up.
No they put the game out for the Nintendo DS only and called it Call of Duty Modern Warfare Mobilized
either your disc has been scratched or your 360 has problems. If other games work it means the 360 has scratched the disc when you put it in. Hope it helps and i suggest you try out a ps3 LOL.
By my opinion... -If you like to be cheap, put on a grenade launcher. -If you want to be more tactical, put on a red dot sight. -If you want to be a ninja, put on a silencer.
you put your code in of course