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

It's impossible to play over TCP/IP between computers connected directly with a cable on Windows 7. If the PC is the server, the laptop doesn't see it in the list of available games. And if the laptop creates the game, the PC sees it, but there's an error when joining the game room. The original game works fine, and we played both directly over the network and through Hamachi, but it doesn't work with the mod. The game is installed on both computers from the same disc. Heroes 3 from Buka (complete collection).