You are already in the game, click on New Game > Multiplayer, here you will see a new button, Online Lobby. Make sure that the HD+ option is checked in HD_Launcher, only then will the Online Lobby become available.
If you managed to install these two items correctly, run HD_Launcher (you should have a desktop shortcut)ģ. You can find a step-by-step guide here.Ģ. It is necessary to install Heroes 3 Complete from GOG and then HD mod. I’m talking about the Heroes 3 Complete version, which you can buy via GOG.COM (it costs around €3 most of the year) to which, when you install the HoMM3 HD mod, you immediately have an Online Lobby available and you can play with your friends or just challenge someone. Forget the crap version that can be purchased on STEAM (does not include the Armageddons Blade and Shadow of Death datadiscs). Heroes 3 is still very easy to play online with friends nowadays.