I asume you are talking about a CoD lobby and I wouldn't recommend it on Xbox has they are hot on banning people who do. However, Ps3 is not and so I have hacks and mods on there. If your very desprate try 'googleing' Derek-trotter. :)
How do I create my modded lobby on gears of war 3
you have to get in a modded lobby
No, You cant even Play on xbox live with a modded xbox 360 or modded game
You got deranked.
Usually Ground war because there's the most people in one lobby. But sometimes free for all because a lot of people go on that section. But there is a very low chance that you could find a modded lobby, it's really rare. Hope this helps :)
Unless you are in a modded lobby...you cant.
its like what normally happens though if you stay in that lobby for 14+ hours you may have a problem
To access a chessboard lobby in Call of Duty: World at War, you typically need to find a modded lobby that features this specific setting. Players often share server details or use modded game files to create these lobbies. Joining requires connecting to a specific game hosted by someone with the appropriate mods. Note that participating in modded lobbies can risk your account, as it may violate the game's terms of service.
its probably modded or hacked or banned.
To start a challenge lobby a JTAG is needed a Jtag is a hacked/modded xbox it ranges from $150-$500
you can go the tech game.com and get som mod on a lot of game
Create a private match and invite friends. Feel free to tweak settings. Or, you can host a modded lobby.