There's something I don't quite understand, which difficulty does the speedrun need to be in? If it has to be done in insane then I don't have a single idea of how someone got a time of less than 2 hours, however if the speedrun can be done in any difficulty and therefore the easiest one then I'm pretty sure you could get a time of an hour and a half or so, but if any1 could tell me I'd be grateful