I agree with everything except the claim that the fourth installment is plagiarism!
I honestly don't know what that Forge Castle is, because I've only played the fourth game three times in my life.
I do know that there was a mechanical dragon in it. When I was unsure whether my race would fit into the Heroes universe, I remembered it and decided that it would.

I agree with the rest. It's very difficult to come up with something new. And it's simply impossible to come up with something that doesn't exist in Warhammer.

But the point is that it all started when one user began to praise the developers of the sixth installment, saying that they had done a great job and come up with a great race! To which I replied that the developers are not doing a great job and that what they came up with took them a minimum amount of time, because a new race can be created in a period of one day to one week.
Which I have essentially demonstrated.
After all, there is no need to invent anything - it all already exists. It's like a constructor - the parts are the same, but you can always put something different together.
In short, I still don't understand what they are spending their time on at Black Hole. Moreover, instead of water and snow nymphs, they could have come up with something brighter for the Nagas.

By the way, the pneumatic fists were honestly taken from me from Fallout 3, although they weren't steam-powered there.
The Icarus are a reference to Warhammer - that's true.
In my mind, the gunners just looked like big, pumped-up, bubble-like giants. I wasn't even thinking about Ogryns at the time. Although, by description, there are many coincidences.
A mechanical robot giant with a pilot inside is a cliché in itself, even without Warhammer. I wasn't thinking about it at that moment either, although by description, there are many similarities with a Dreadnought.
But the name of the race was honestly taken from Warhammer, as it simply sounds pleasant to the ear, and I didn't want to spend too much time on it.