COD Black Ops Challenge Lobby?

I recently heard my COD nut of a friend talking about a Modern Warfare 2 Challenge Lobby. I don't know what this is so could someone please explain? And I was also wondering if there was any way to make a challenge lobby on COD Black Ops. Any help would be appreciated. Thanks.

I've never heard of a challenge lobby but I think you mean 10th prestige lobby. These kinds of lobby's give you automatic 10th prestige without doing anything but killing another player at the end of the lobby. It is quite difficult to explain just through text, but search a video on youtube like "Modern warfare 2 10th prestige lobby" . If you have Xbox or Playstation 3, make sure to watch out if people tell you that they will get you into a 10th prestige lobby if you pay them microsoft points or through paypal, there are lots of scammers out there :/ . To my knowledge there is no 15th prestige lobby in Black ops but there are hacks for it, I do not recommend you using the hacks though, as Treyarch became more alert of hackers proceeding to hack constantly in the Call of Duty series, they will be sure to ban you, along with the report system it causes an even higher chance of becoming banned. Hope this helped!