HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

I'm a low-level player, but in my opinion, all these additions to the game make it too easy. For example, the autobattle sometimes fights in a very cheesy way; if I disable it and replay, I often lose more than against the computer. And if you add all sorts of additional combat enhancements, it will be easier for experienced players to play manually, but it will never allow players like me to develop skills, or they will develop them too slowly. Marking all stacks will make players think less, but Heroes was conceived as a strategy game. Although, given that there is now this chess timer, such marking would make sense. For example, make it so that stacks can only be marked when the timer is enabled. But again, this is just my humble opinion.