Sorry this is coming 2 years late, but here are some aids for you:
Definition of Nihilism:Nihilism is the belief that all values are baseless and that nothing can be known or communicated. It is often associated with extreme pessimism and a radical skepticism that condemns existence. A true nihilist would believe in nothing, have no loyalties, and no purpose other than, perhaps, an impulse to destroy.
Definition of Moral Nihilism: Moral nihilism (also known as ethical nihilism) is the meta-ethical view that nothingis intrinsically moral or immoral. For example, a moral nihilist would say that killing someone, for whatever reason, is neither inherently right nor inherently wrong.
As for fascism, they tend to surround themselves with people who are "like them." I am not sure how this would translate into a game.
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