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

Then everyone would set it up for themselves as they see fit, and if we do it that way in tournaments, we are doomed to endless debates about which birds to include and which to exclude. Or the organizers will dictate it in the rules.

Well, right now, it's not the organizers who dictate it, but the developer. Essentially, I'm suggesting that we shift this responsibility from the developer to the tournament organizers (and, in essence, to the players as well, since they are in dialogue with the organizers). Such a system would be much more flexible, and, in the end, there are different tournaments, so players can find those whose rules they like more.