The 20th century brought sci-fi scares into prominence with greats like Alien, The Thing, Cube and Event Horizon, but this was only the beginning. The leap into the 21st brought so much more innovation on the sub-genre of horror with it.
Psychological horrors about the errant use of time travel, anti-hero origin stories and even "what if?" takes on the superhero genre have come to fruition. Stories that have surpassed time and space, rather than plain ol' horror relegated to Earth, have been well received too.
It's not just the stories though. The advent of new platforms has led to new film-making techniques and ways of telling these stories too. Evolving the found footage style, beautiful CGI and improvements in digital camera movements have helped filmmakers hone their craft in recent years.
As the platforms expanded from just the silver screen and home video, with streaming services like Netflix becoming monolithic, writers and directors had less constraints to impress Hollywood bigwigs.
This in turn has led to more variety, not just in where to watch but in what to watch, as this list will show you.
For now though, prepare yourself for twenty of the finest examples of 21st century sci-fi horror. Fair warning though, some of these do get a bit dark.