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

baratorch, can you explain why heroes with the HD mod put the maximum load on the thread in which they are running?
My processor has 4 threads, and when I launch Heroes with the HD mod, the load is 25% – that is, 1 thread at 100%.
Without the HD mod, the load is minimal, 1-2%.