The science fiction genre is full of countless villains who would make your skin crawl. Ranging from alien overlords and corrupted computer programs to faceless corporations and humanoid automatons, there are far more than we could ever count. Still, it's the antagonistic forces that we often dwell on once the latest movie comes to a close, wondering how we might have defeated them or avoided their presence altogether. It's with this thought in mind that we consider the scariest sci-fi villains ever.

But what does "scary" even mean? On the most basic level, we should consider any sci-fi threat that is frightening based on appearance and physical presence to be among the scariest. Alternatively, some of the most terrifying foes are those with powerful criminal minds, using their formidable

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