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

What is this even about?

HoMM3 HD
...
fixes several gameplay bugs from the original game:
* all supported versions
* optional

1) bug with selling artifacts at an inflated price,
2) "not me" bugs, which allow you to get 'extra' information about the opponent in a multiplayer game.
3) bug with the "camouflage" spell, due to which the spell did not make sense to use for the first player in a multiplayer game.
4) Automatic correction of the consequences of such bugs as:
- the appearance of a hero's shadow on the map
- hero duplication
- city turning gray
- one hero is controlled by two players
- in the tavern, you can hire a hero who has already been hired by someone else