PlayStation - 2 Answers
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1 :
theres not really a guarantee,but if it doesn't,you can contact Microsoft or send it in to the customer service place or call the number listed with it
2 :
I am fairly certain that certain games only work for certain regions. For example, a North American game only works on a North American console. Or a Japanese game won't work on a European console. At least, that is how it worked on the PS2. I am not sure about the current generation of consoles.