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

This mechanism is implemented for offline play. I believe it is unacceptable for online play.

How is this "mechanism" implemented (if we are talking about separate resource gathering, then an integrated, instant order system would be desirable), or am I missing something?

We are talking about single-player, right! Or is there a way to play single-player with two players? )))