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Yes, and Prospektor isn't even necessary; everything can be found in the editor, and anything that isn't clear can be checked in the save file. People played and achieved excellent results even before Prospektor, but of course, you quickly get used to good things.
Well, in general, to complete such a map in such a time, you need to do a huge amount of work.
Well, in general, to complete such a map in such a time, you need to do a huge amount of work.