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

By the way, I started a new game yesterday on difficulty 3.37, and the maps generated had strange guard houses. First, the opponent gave up a guarded mine with wood. Then, there was a generation where one secondary guard house had 10-19 Storms (which isn't normal), and the other had 20+ Monks (in Haven). In the final map, I have a Hive guarded by 10-19 wood. Overall, the guard houses were strange. Could this be due to a mod?