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If it's on the Xbox Live Marketplace then no.
no
No they made it for PS3 and Xbox 360
No, a silver membership can be used for this.
No.
Depends on whether it's Xbox live or not. You can make one free that doesn't, have Xbox live
no you have to make one then you have to connect your xbox live acc to it
Xbox live cards work on both kinds of xbox.
no
Yes but only if you make your XBox Live account over the Xbox Gamer Tag(non-Live). Basically, You are just converting that gamer tag from XBox(non-Live) to Xbox Live.
No
No