Marlo_Stanfield
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What was the specific difficulty in 2008? Sure, the prospector and other features speed things up, but back in my day (before HD came out), everything could be checked and found manually (map editor + scouting with cheats) without any problems (except for objects with a modified interface, but that's just a perversion).
If I'm not mistaken, the guy who advertised it also played through it, which tells us that with enough perseverance, anyone can complete it in 100500 days.