My friend was tellling me that all throughout the campaing hints of the "zombies invasion" were dropped. I didn't notice anything except for obviousey the part after you beat campaign alltogether. Is he just bull-blam!- me or did I really just miss this part alltogether?
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LOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLL WUT?