I'm not sure yet about having werewolves in the game. I also don't want the game to be something to put everything into, there's enough with aliens.
... the werewolves howling in the fog are... interesting. And they can fit well into the game if we consider that Anunnaki mythology talks about creating the man playing with genetics. So many ancient mythological creatures, half man, half animal, could be explained by that hobby of aliens with genetic experiments.
These werewolves would not be magical creatures, men who become wolves on full moon nights and can only be killed with silver... they would only be beasts, products of an alien playing in his laboratory.
I was also planning to have minotaurs, in the same way.
And lions, but I need animations for them.