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

I played a few games with the buggy auto-battle feature in version 3.05, and it worked fine – many battles were acceptable and didn't need to be replayed after the auto-battle. But today, I downloaded the latest version of the mod, and only one battle was accepted; I had to replay all the others, meaning there was a time saving of 0.001% :(