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

In the latest version, 3.17f, the turn starts immediately, rather than after clicking the checkmark. I couldn't find such an option in the _HD_.ini file. Also, if the opponent doesn't have HD+, the game cannot be started; you have to exit and disable it. It would be nice to have an automatic disabling of HD+ if the opponent doesn't have it.