To win, you must capture all enemy towns and castles and defeat all enemy heroes. Some Border Guards can only be passed if a Hero carries a Quest Artifact from a previous scenario, but the reward is great indeed.
Catherine: We now know how Erathia fell to Nighon and Eeofol. Through an extensive network of underground tunnels dug by the Overlord’s armies, they struck simultaneously in many areas with overwhelming numbers. Credit the military for holding the invasion to half the country. We have discovered the main artery for transporting forces from Nighon to Erathia; it is under the ocean, connecting the Nighon underworld to the Erathian mainland. Bracada and Avlee have sent armies to join the fight. First we must eliminate the remaining Kreegans and Nighon forces from the mainland, then pursue them underground, and drive them back to the shores of Nighon.
The Dungeon Overlords are clever. While the Devils of Eeofol attacked Erathia's borders, the forces of Nighon tunneled nearly the entire distance to Steadwick, launching surprise attacks almost simultaneously across the nation.
Forces from AvLee and Bracada will assist us in this final push. No Nighon or Eeofol outposts can be permitted to survive in the tunnels. We must teach the Dungeon Overlords a lesson they will never forget. Good luck.
Day 2
Sailing away
You might be able to take a large force to Nighon by sea, attacking them from above, but you must use caution as the reef-filled Straits are both wide and treacherous.
Defeat All Enemies
Lose All Your Towns and Heroes
Tower
Rampart
Castle
Dungeon
Dungeon
Sentinel's Shield
Thunder Helmet
Spyglass
Speculum