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Would I get the achievement if I logged on to xbox live with my brother as a guest, and my friend logged into xbox live with a guest, and we did highway? or do we need 4 separate xbox live users?
I'm Aeromaster56 and I approve this message.
I'm almost sure you can do it with guests.
yea u can do that because i helped a friend get it, while i was siged in as a guest