TT_TT_TT_TT: Hi there. I just checked the gamecard for Heroes 3 (
https://www.gog.com/game/heroes_of_might_and_magic_3_complete_edition) - Multiplayer gaming is only possible via LAN or in Hotseat Mode as the original servers have been long shut down
"Multiplayer notice: Heroes of Might and Magic® 3: Complete supports multiplayer over LAN and hotseat." So if you want to play online with friends you would have to use a tool like GameRanger or Hamachi to enable online play again
It's always advised to check the gamecard of the title before finalizing the purchase. That way you can make sure you meet minimum system requirements, check all the extra features (or lack thereof) and any other useful information like the multiplayer notice in this case.
