Posted by: chickenlittle
You cannot play the game with an account that has limits set on it. You can download and play it with the new account, but you'd have to have the limits changed on your main account.
I'm 13 and I can play San Andreas from market place. As well as DOOM. You just have to use a different account to download them I think. Make one that's 21 just to be safe and use one of your free 1 month gold trials. Also make sure on your main account all your family settings are turned off and all of them are disabled. You still can't DL M content because Microsoft checks age, not paerntal controls.