Sinot
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Ubisoft themselves made a statement that all the source files for Shades of Darkness are irrevocably lost.
What kind of illegal manipulations can there be with something that doesn't exist in nature?
Ubisoft themselves made a statement that the Heroes series is closed.
That's why they show no interest or make no claims.
And besides, Hota is a free modification; there's nothing even to complain about.
It is installed on top of Shades of Darkness, which all players have officially and honestly purchased.
For example, Skyrim has hundreds of such modifications.