I also completed the "Rise of the Underlord" campaign; it's truly challenging, a very difficult campaign. It requires a lot of time and perseverance. If anyone is struggling to complete it, I can describe how to do it. I think the most difficult mission (if you don't know what to do) is the 3rd mission of "Grand Order". But once you know how, it's quite easy. In the 1st mission, develop (Intelligence, Pathfinding, Logistics, Wisdom, and 1 skill of your choice – it's best to choose Enchanted Defense; 2nd skill can also be chosen, but Diplomacy is better, so you can easily complete the 2nd mission by joining forces at the beginning). The most important skill in the 1st mission to complete the 3rd mission is Keen Eye! You need to level it up to Expert in the 1st mission and steal the Resurrection spell by attacking the Dragon Castle in the dungeon. Then, in the 3rd mission, reload a few times after attacking Utopia to get the best artifacts (preferably for 50,000 gold, a hat with +6 to all stats, and a couple of other good artifacts). And then, most importantly, spend all your money only on Minotaurs or Manticores. You can find a walkthrough of the 3rd mission here: http://img0.liveinternet.ru/images/attach/c/2//3872/3872270_rrr3.rar The following missions are relatively easy to complete.