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This is a very well-known mod about a pirate town. Horn of the Abyss. Just Google it.
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And for some less well-known mods for the third game, they created models and animations. I remember there was a mod with a dark version of the human castle, with inquisitor executioners and dog handlers or something like that. There were also new models created from scratch. But the fifth game didn't get that. Of course, the models in the fifth game are more complex than in the third.
Ah, I know those, but there are no models there, there are only sprites, or are there source models somewhere?!