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hopefully, this isn't the case – personal impressions from a fan who had the chance to play.
On the The Heroes Round Table forum, personal impressions from one of the fans who had the chance to play the Heroes VI demo at Gamescom 2010 appeared. In short:
* Objects on the map have become much more detailed than in Heroes V.
* Although the map remains three-dimensional, now you don't need to rotate it to avoid missing any object or item.
* Every other scenario will feature battles with "bosses" – huge monsters that clearly occupy more than a 2x2 tile.
* There will be composite artifacts.
* There is a Dungeon.
* A fort has appeared, from which mines are controlled within its zone. Whoever owns the fort receives resources from these mines.
* You can create bookmarks on the global screen and the battle screen. For example, on the battle screen, you can display your favorite spells on the panel and cast them from there, without digging through the spellbook.
* The same map editor that the developers use will be released, but with a more "user-friendly" interface.
* There will be a tutorial map that can be safely skipped, and you can play the "real" Campaigns.
* After the player completes 5 Campaigns (4 scenarios each), the final Campaign will become available.
Added 2 minutes ago
also, a new race, the Naga, will appear