I have completed all adventures. Got the England key. Canada/Brazil/Spain are complete w/all equipment and kills,but no keys. Where are the keys? Needless to say,my comprehension skills are at their lowest.
The keys are drops, just like the destructive items. To get the keys at certain locations, just complete the outbreaks requiring most energy (I heard a rumour they have the highest chances). Then complete the outbreak, then complete it again, and again and again...
