[ostwilkens]

> add new towns, creatures, heroes, artifacts and spells without limits or conflicts

If the original game had these features, it would likely have gotten me into programming at an even earlier age!

[orphea]

In the Wake of Gods mod (aka HoMM 3.5) had ERM scripting and it was hella exciting for a kid! You could make your own artifacts, automate things on a map, make a dynamic story that reacts to your actions.