Heroes of Might and Magic is such a great long form gaming experience, whether you played solo or with some friends. GOG does provide access to new copies if you'd like it, but I have to highly recommend if you want to play on modern hardware to grab the open source VCMI Project engine for Heroes 3. Heroes 3 is often touted as the best of the series, and the cross platform engine allows you to play on modern Windows, macOS, Linux, and Android.