Well sometimes it depends if it's the campaign you just get any achievement ( Xbox 360) or a trophy ( PS3). If it's multiplayer then you can get 10th prestige or stay level 70 and get all weapons with Fall. If it's Special Ops then it just gives you achievements or trophies for you accomplishments.
No
prestiege
Nothing. Even on veteran. It's pointless.
Nothing really, you just get a achievement, I think.
usally when no one wants to play. they make them to keep people playing their games. if you drag it out, you have more time for the new game MONDERN WARFARE 3
You obtain the achievement named ''Star 69'' worth 90 points.
You can't
u dont
Some games will have more then 1 player.for a example halo you can have a guest.But on call of duty 4 mondern warfare you can only have 1 gamertag signed in and go to mulitplayer and xbox live. : )>
nothing
Finish Campaign Finish Online ( 10 prestige )
U go to multiplayer if no multiplayer u beat