Space exploration, extraterrestrial utopias, fearsome aliens, highly advanced technology.

These are all among the things that make the sci-fi movie genre one of the most popular of all.

Its first sequel,James Cameron’sAliens, is one of the most thrilling action movies of all time.

10-Worst-Written-Sci-Fi-Movies

Custom Image via Federico Napoli

From the very moment things kick off, the screenplay completely undoes the victory of the past installment.

Sadly,he has achieved that title through terrible movie after terrible movie.2012is among his worst.

Its sequel,Revenge of the Fallen, much less so.

Sigourney Weaver as Ellen Ripley looking down in surprise in Alien 3 (1992)

Image via 20th Century Studios

Then,RoboCop 3went from brutal R-rated action to a childish PG-13 story, and fans lost their minds.

The real villain of the story is no mystery: It’s the script.

Incoherent, poorly paced, and willing to trample on the fascinating lore of the first film.

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Thus, in the end, it feels likeLeft Behindis doing too much and accomplishing nothing.

It’s a ridiculous, trite disaster film with nothing to offer in any senseparticularly not writing-wise.

Ron Hubbard,is well known as one of the most abysmal movies ever made for a reason.

Los Angeles falls into the sea in ‘2012’

Image via Sony Pictures Releasing

Everything about it is a crude embarrassment, and its screenplay in particular is among the worst offenders.

As they resurrect the planet’s dead, the living are put in danger.

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KEEP READING:The Worst Movies of the Last 25 Years, Ranked

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The human cast of Transformers Revenge of the Fallen looking up at something

Image via Paramount Pictures

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Robocop stands protecting a little girl while a woman with a gun stands beside him

Image via Metro-Goldwyn-Mayer Studios

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Christopher Lambert and Sean Connery in Highlander II: The Quickening

Image by InterStar

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Left Behind (2014)

Image via Freestyle Releasing

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Terl, an alien warlord with long hair, stands at the command of his ship.

Image via Warner Bros. Pictures

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Howard looking confused while facing the camera in ‘Howard the Duck’

Image via Universal Pictures

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A man and a woman standing next to each other in Plan 9 From Outer Space (1)

Image via Distributors Corporation of America

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Left Behind