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I really hope that the Offline Campaign has no impact whatsoever on any online statistiks or equipment.
Offline is dangerous, in a matter of time (and Time in this case means <2 Days) there will be a trainer that could give you all achievements, may it any type of credits, ranks, points ...etc with a single mouseclick.
Better they do a "semi offline mode" like it's done in Diablo III
When you have cake, it is not the cake that creates the most magnificent of experiences, but it is the emotions attached to it.
The cake is a lie.