Heroes VII

Well, do you mean the game's open-source code? If so, then yes, there's a problem. I doubt that Ubisoft would just give it away and provide it to anyone who wants it.

No, I mean the following, specifically:

1) In Heroes of Might and Magic VII, the models are from Heroes of Might and Magic VI, but they were obtained from the source files of the models in Heroes of Might and Magic VI...

2) You can add a new model to Heroes of Might and Magic VII using workarounds, although I haven't personally delved into the game's editor, but it's not straightforward...

3) But the biggest issue is that you can unpack the mechanics, but putting it back together doesn't always work properly – it's a "feature" of the engine, but since development has been shut down, we shouldn't expect a user-friendly interface anymore...

4) All that's left is to hope that they sell the series to decent people who love making and do make turn-based strategy games... I dream about it...