Well, I think not just that, it could pretty much help expand the amount of game hours in a simple way by having the same areas, but different monster placement and perhaps some other little extras. (Extra events or perhaps some funny/interesting trivia.) I would love do give it a try myself as the scripting language seems easy to learn and (I hope) I just have to go through each map in the editor and see what entities could be added and which could be deactivated if having a Hard Mode. I just need to know whether or not it is possible to modify the Main Menu to have an extra option and if this option could persist and be saved in the save game. (Would preferrably want this all to look clean and official.) Anyone got any ideas?
EDIT: Topic name changed as it might be indeed a better idea to try this ourself, assuming it can be done one way or another.