Heroes of Ashan: Antares

vadim_t - try waiting a week - if the map doesn't have a check for the quest "capture any city within a week," then the Demons will definitely be eliminated from the game. Maybe you didn't capture all the cities? There's one of the portals that's three-way - in the Dungeon, there are THREE Demon cities.

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I took both castles and rushed after him.

There's also a capital city - through a portal near the southern city.