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

Marmot, thanks, I'll go to that thread, maybe they can help me there. I downloaded the mod from different sites, including the official one, and I have the latest update installed, but I couldn't find anything similar in the FAQ((( Wait, is this it? http://rutracker.org/forum/viewtopic.php?p=64919007#64919007 Dirty_Player, Reinstalling won't help, I've tried so many different versions that if the problem was with a faulty installation, it would have been resolved a long time ago. I also downloaded a lot of maps from different sites, but they all still glitch. It used to work normally with HD+, but I tried without it, and the bugs remained.