some of them are but people bring out new ones.
No patched
yes
go to c2gnation.com for all the free tenth prestige lobbies! 100% legit lobbies everyday
yes
10th Prestige lobbies are hacking into the game which could be illegal in some cases. Be careful when doing these and you may have somebody just steal your credit card number.
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No. Activision/Infinity Ward patched that with Patch 1.65
YEA
No, but Microsoft does not like u and will both ban u and make u lose your Microsoft points
MW2 10th prestige hacks are NOT free. You may buy them at certain websites or at 10th prestige lobbies. Buying it on websites cost $50.
You can find alot of 10th lobbies on modding websites and modding chatrooms Ex: Download Modio (A hacking program off of Game-tuts.com) and when you pull it up you will see plenty of people talking about hosting free tenth lobbies.
Modded lobbies have now been patched in MW2. I suggest you don't mod as it could lead to your account being banned.