Mapmaking tips.

It's quite possible – I'm currently replaying maps on the "Whirlwinds of War" setting, and many of them were created for the fourth installment (there are significantly fewer for "The Gathering Storm"). But if you remember how the fourth game bogged down the computer, you wouldn't want to play it. Of course, this is if the problem is with the scripts. But if they forgot to create the necessary passage or the possibility to open it (with a hint), then it probably doesn't depend on the game version.