The 25 Best Sci-Fi Horror Movies



Copy link

Voting Rules

Vote up the best sci fi horror movies.

Science fiction and horror have been a match made in heaven since the inception of both genres. The two genres go together like peanut butter and jelly, both perfectly complementing the strengths of the other while masking their individual weaknesses. Asking profound, poignant, and uncompromising questions has always been the forte of sci-fi, and with the haunting unease of horror in its pocket, suddenly a beautiful amalgamation has been formed that wants to scare harsh and dark realities of life right to audiences' faces. The best science fiction horror movies all take audiences down a dark and winding path that will scare them both physically and mentally, and though they may come out the other side, they will forever be a changed individual because of what they just endured.

These incredible fusions of science fiction and horror push the envelope of both genres while forcing audiences to look at themselves in the mirror and ask hard-hitting and profound questions about life, happiness, and what it means to be human. From the films that helped blend the two wonderful genres together in the first place like Frankenstein and Them! to films that perfected the ideology and harmony of sci-fi and horror with The Thing and Alien, all of these films helped make the world of sci-fi horror what it is today. Even now, films are continuing to innovate and push boundaries, with the creation of technological horror films like Possessor and The Invisible Man, which are reshaping the genre blend for the modern age.

Vote up the best science fiction horror films of all time, and don't forget to check out The Best Horror Movies of all Time and The Best Sci-Fi Movies of All Time to get a full history of both of these phenomenal genres in films.

Photo: Alien / 20th Century Fox

  • 1
    53 votes

    Trapped in space with an apex predator hunting down and killing all the members aboard the USCSS Nostromo, Alien uses perfect pacing, unrelenting dread, and one of the most haunting and legendary alien creatures to give audiences an experience they won't ever forget. Created by Sci-Fi master Ridley Scott, Alien beautifully mixes elements of both the science fiction and horror genre by fully fleshing out its futuristic world to appear to be something that could actually be. The immense sense of realism, even future realism, helps ground the film while the Xenomorph simply sheds a terrifying light on the hubris and curiosity of man. 

    • Actors: Tom Skerritt, Sigourney Weaver, John Hurt, Veronica Cartwright, Harry Dean Stanton
    • Released: 1979
    • Directed by: Ridley Scott

    Available On:


  • They Live!
    Photo: They Live
    17 votes

    John Carpenter delivered one of the most prolific, poignant, and incredible stories about rampant consumerism in the light of an alien invasion the world has ever seen in They Live! With Roddy Piper and Keith David at the helm, this incredibly strange but masterfully crafted film dives deep into ideas and themes of what man truly needs, and how we all live in a world, where it is not the same for everyone. With some of the most memorable alien designs in the history of cinema, They Live! has a plethora of themes and messages to unpack, but at the end of the day, it is simply an incredibly made film that is fun and frightening, plus that way too long fight sequence is simply a work of art. 

    • Actors: Roddy Piper, Keith David, Meg Foster, George "Buck" Flower, Peter Jason
    • Released: 1988
    • Directed by: John Carpenter

    Available On:

  • The Thing
    Photo: The Thing / Universal Pictures
    52 votes

    Not only one of the greatest science fiction horror films ever created, but arguably one of the best films of all time, John Carpenter's The Thing is a masterclass in suspense, dread, terror, and unease as a group of scientists are stranded in Antarctica while a monstrous Alien who can disguise itself as one of them is on the loose. With a pulse-pounding score and a whiff of paranoia steep in the air, The Thing excels as a horror film by putting audiences smack in the middle of the action, as we too are terrified to learn who has become one of those things. With one of the most haunting and devilish alien designs in history, the film is as close to a masterpiece as one could hope for.

    • Actors: Kurt Russell, Wilford Brimley, T.K. Carter, Richard Dysart, Richard Masur
    • Released: 1982
    • Directed by: John Carpenter

    Available On:

  • Aliens
    Photo: Aliens / 20th Century Studios
    37 votes

    Drastically different than its 1979 predecessor, Aliens opts to become more of an action sci-fi horror film, rather than a slow-burning horror film with sci-fi elements, and while such a drastic change could have been disastrous, in the hands of director James Cameron, it was sensational. The fast-paced, dangerous tone of the film mixed beautifully with the slow-burning terror and suspense of the first as audiences knew exactly how dangerous these creatures were, and even if the beloved space marines were slowing them down, the Xenomorphs always were the bigger threat. With Sigourney Weaver delivering the performance of a lifetime, Aliens is one of the most beloved films of all time for good reason, it is simply that good.

    • Actors: Sigourney Weaver, Carrie Henn, Michael Biehn, Paul Reiser, Lance Henriksen
    • Released: 1986
    • Directed by: James Cameron

    Available On:


  • Predator
    Photo: Predator
    23 votes

    With so many beloved lines, standout performances from Arnold Schwarzenegger, and the introduction of one of the most legendary aliens in the history of cinema, Predator hit all the right buttons to become one of the premier action sci-fi horror masterpieces. A film that, on paper, should not work nearly as well as it does, a bunch of butch men hunting down an alien is a fairly basic premise, but the top-tier action, terrifying hunting scenes, and gorgeous sci-fi elements helped make the film an instant classic when it released in 1987. 

    • Actors: Arnold Schwarzenegger, Carl Weathers, Jesse Ventura, Elpidia Carrillo, Bill Duke
    • Released: 1987
    • Directed by: John McTiernan

    Available On:


  • 6
    35 votes

    Director David Cronenberg is the absolute master of blending surreal science fiction and haunting horror on the big screen, and he may have no greater accomplishment in this than with his hit 1986 film, The Fly. Using the scientific elements to create the horror, Jeff Goldblum shines in this disgusting and masochistic look at the quite literal decay from man to beast, and how painstakingly horrid the process is. Showcasing some of the vilest and most incredible practical effects in the history of horror, the slow and agonizing transformation scene will seer itself into the minds and souls of audiences everywhere, and the final reveal is what nightmares are made of.

    • Actors: Jeff Goldblum, Geena Davis, John Getz, Joy Boushel, Leslie Carlson
    • Released: 1986
    • Directed by: David Cronenberg

    Available On: