Low Budget Sci-Fi Movies That Wound Up Making Millions

The first thing any filmmaker and studio need to agree on before embarking on the movie-making journey is a budget. The amount of money available to be spent will dictate just about everything, from casting and locations down to how scenes in the script can be bought to life. With science fiction, the budget undoubtedly decides what kind of special effects are possible. Still, just because a sci-fi movie is made on a limited budget, it rarely stops a director from dreaming big.

Sure, some filmmakers are realists and know it's unlikely to become the big blockbuster. Still, every single one probably wonders if theirs could be the next surprise hit, unexpectedly amassing millions of dollars at the ticket counter. After all, in the history of cinema, plenty of sci-fi films have.

Some of those were cult favorites made on a shoestring budget, while others were one-off successes that earned their producers accolades and became stepping stones to bigger careers. At least a couple of these surprise hits have gone on to become some of the most well-regarded sci-fi classics. Wondering which low-budget science fiction movies actually made millions? Read on to find out.

Science fiction is always at its best when it explores serious political and social issues, but the '80s were a time when the biggest sci-fi films embraced action and excitement. However, one independent film, "The Brother from Another Planet" starring Joe Morton, went straight after the topic of racism. It tells the story of an alien from another world who resembles an ordinary black man who lands in New York City while on the run from interstellar bounty hunters.

Throughout the film, the Brother, as he is only known, finds work as a television repairman while using strange other-worldly powers to aid in his quest to understand humanity. What he finds is a highly fascinating culture that he slowly learns to appreciate, warts and all. Though the movie's low budget is evident — there are few effects to be had and the alien make-up for his inhuman feet is crude and brief — it remains a powerful sci-fi story dripping with social allegory. 

Led by Morton's evocative performance, "The Brother from Another Planet" connected with audiences and earned well over $3 million in domestic theaters. While this may not sound like much, consider that it was produced for just $350,000.

Probably the most famous low-budget success story of all time, the Australian sci-fi action movie "Mad Max" came from the mind of writer and director George Miller. A raucous debut for the future legend, he'd cast little-known actor Mel Gibson in the role of Max Rockatansky, a law enforcer in a post-atomic nuclear wasteland where warlords vie for power and small communities of survivors scrounge for scraps and precious oil. 

Made for just $200,000, Miller seems to have funneled what little money was available into its fast-paced action and over-the-top stunts, using the desolate Australian outback as a cheap stand-in for the barren apocalyptic landscape. Today, the film is seen as a watershed classic, a cinematic ground-breaker that touched off a wave of copycats, all seemingly inspired by the film's ability to make a top-notch sci-fi action movie on a minuscule budget. Movies like "The New Barbarians" and "Dune Warriors" all tried their hand at aping the success of "Mad Max," to no avail, while even big-budget Hollywood copycat's emerged like the infamous box office bomb "Waterworld."

This cottage industry of failed rip-offs sprang up not just because "Mad Max" was a great movie made on the cheap but because it raked in nearly $100 million at the box office. Yet none of these imitators seemed to grasp that it was Miller's impeccable storytelling that made the film great.

Filmmaker Terry Gilliam today is remembered for his big screen favorites like "12 Monkeys" and "Fear and Loathing in Las Vegas." In the early 1980s, however, the writer and director was still likely best known for his role as an animator and part-time actor in the British comedy classic "Monty Python's Flying Circus." His first directorial effort was on the troupe's big screen debut "Monty Python and the Holy Grail," and a few years later, in 1981, he'd helm the sci-fi fantasy favorite "Time Bandits."

Produced on a modest budget of just $5 million, "Time Bandits" was co-written by his "Monty Python" pal Michael Palin, and costarred fellow "Monty Python" vet John Cleese alongside the legendary Sean Connery. The expansive supporting cast included Shelley Duval, Ian Holm, David Warner, and Kenny Baker. The film told the story of an 11-year-old boy who learns that his bedroom closet hides a portal through time. Drawn into a time-traveling adventure where he meets the likes of Agamemnon (Connery), Robin Hood (Cleese), and Napoleon (Holm), the boy fights alongside a group of dwarves on a quest to find a vast trove of riches.

Considering its small budget, the film was seen as a big success with a $42 million box office run. It helped propel Gilliam to directorial fame and finally earned him the clout needed to get his passion project, "Brazil," off the ground. 

A darling of the indie scene in 2012, "Safety Not Guaranteed" took the sci-fi genre by storm with an unconventional drama. Presenting a quirky, offbeat story of a man who answers a bizarre personal ad looking for a companion for a trip through time, you might be surprised to learn that the film is actually based on a real newspaper ad. Directed by Colin Trevorrow and starring Aubrey Plaza, Mark Duplass, Jake Johnson, and Kristen Bell, the movie garnered praise for its oddball story, idiosyncratic characters, and sharp screenplay, becoming a cult hit in the process. 

What earns it a place on our this list is that the movie was made for not much more than $750,000. Picked up by Film District for $1,000,000, the producers netted a decent profit before it was ever released. When it did land in theaters, it totaled a modest but impressive $4,010,957 despite being shown on less than 150 screens in the United States and limited showings internationally.

Where it really shined, however, was with critics and audiences. It also must have impressed studio brass because Trevorrow was plucked from obscurity to oversee the relaunch of the "Jurassic Park" trilogy. 

Just two years after "Upgrade," director Leigh Whannell struck again, turning another low-budget Blumhouse production into a barn burner, perhaps the biggest on this list. This one was all the more impressive, as the box office take for 2020's "The Invisible Man" was hampered by the COVID-19 pandemic early that year. Led by "The Handmaid's Tale" star Elisabeth Moss, "The Invisible Man" took the classic story of a scientist who finds a way to become transparent into a powerful treatise on domestic violence.

In this version of the story, we meet Cecilia Kass (Moss), a woman stuck in a toxic and dangerous relationship with her domineering husband, a scientist named Adrian Griffin (Oliver Jackson-Cohen). However, when she finally escapes his abuse, Griffin apparently ends his own life, leaving her millions of dollars. Though she's at first relieved to be free of him for good, she soon begins to believe that his experiments in invisibility have given him the perfect opportunity to fake his death and haunt her from beyond the grave.

Made on a $7 million budget, "The Invisible Man" is full of nail-biting suspense and eye-popping terror, turning the story from a monster movie into a captivating sci-fi thriller. Released just weeks before mass cinema closures in March of 2020, it still raked in a jaw-dropping $139 million — and who knows how much more it could have made if not for the pandemic.

A film that reinvented the zombie sub-genre, "28 Days Later" was helmed by Danny Boyle, who'd already turned out several big films, including "Trainspotting," "A Life Less Ordinary," and "The Beach." For this new post-apocalyptic movie, Boyle would team with "The Beach" screenwriter Alex Garland and a cast of then lesser-known actors like Cillian Murphy, Naomie Harris, and Christopher Eccleston.

An astonishing new take on the zombie apocalypse, Boyle envisioned a somber, dreary story where a plague has destroyed much of mankind, turning victims into bloodthirsty, mindless flesh-eaters. Nearly a month after the virus has ravaged the United Kingdom, a young man named Jim (Murphy) awakens from a lengthy coma to find the city deserted and must contend with both ravenous zombies and the sinister Major West (Eccleston).

Boyle used the movie's small $8 million budget to good effect. Forced to save where he could, he and his crew filmed in the early dawn hours for astonishingly brief two-hour windows, the only times they were permitted to close down the busy London streets (via Cinema), using multiple camera set-ups to capture as much as possible. Despite the difficulty of the shoot, the movie's mouth-watering $82 million dollar box office take made it worth every struggle they endured.

Even by the end of the 1970s, director John Carpenter was no stranger to low-budget smash hits, with "Halloween" and "Assault on Precinct 13" both produced for under a million dollars en route to tens of millions in theaters. By the mid-1980s, he'd done it a couple of times more, and in 1988 he scored a hit in a new genre with "They Live," a low-budget sci-fi action movie starring a WWF wrestler.

Made for just $4 million — less than Carpenter's own "Escape from New York" seven years earlier — the movie eschews the bigger effects and elaborate sets, telling a grittier, street-level sci-fi story. Absent is a post-apocalyptic setting, as "They Live" instead takes place in modern-day Los Angeles, where a downtrodden blue-collar everyman named Nada (Roddy Piper) stumbles upon a strange pair of glasses that reveal a hidden alien presence on planet Earth. With the help of construction worker Frank (Keith David), Nada sets out to tear down the aliens' worldwide conspiracy.

A science fiction action movie with an unconventional star oozing with razor-sharp social satire, "They Live" has become a beloved '80s classic. While it wasn't as successful as "Escape from New York," it did earn an impressive $13 million on a much smaller budget.