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The Campaign is simply amazing, with a balanced level of difficulty (I played on Veteran mode for the first time), and a captivating plot that makes you want to keep playing. However, it's 2 AM, and it's time to sleep!
The only issue was with the 5th mission. Ignir took some damage from the Dwarves and decided to teleport to the High Elves. He cleared everything, but the game wouldn't let him enter the brown-colored area or, as I understand, return to the Dwarven lands through the garrison. It would be helpful to have a hint at the beginning, warning that teleporting will prevent you from returning. Also, there was a bug with the ancient artifact. First, I killed the Nightmares, but the script didn't trigger; the hero just moved one step at a time. Then, I went to complete the quest (although I didn't even know there was a quest, I thought it was just a level-up point and planned to reach level 30-31). Eventually, I accepted the quest, the script started, and I killed 3 packs of demons, but neither the girl nor Ignir received the reward; it was simply ignored.
By the way, it was a good thing I was leveling up Ignir instead of the girl. While I was exploring everywhere, he was summoning troops and defending the Elven castles.
I'm looking forward to playing the second Campaign. The author is doing a great job creating excellent Campaigns. Another suggestion: it would be nice to have a set of artifacts to collect in the later missions, maybe I just haven't found the Dwarven King's Shield yet. But overall, it's great.