Welcome back to the 2000s – a time when our cell phones flipped, our brows furrowed at the endless buffering of early YouTube, and our movie screens were graced with some of the most mind-bending, spine-tingling sci-fi horrors ever.
From the 'so bad it's good' to the 'how did this not win an Oscar?', these films are the perfect blend of cheesy special effects, questionable science, and heart-racing plots that defined a decade.
25. "Doom" (2005)
Rotten Tomatoes score: 18%
A group of space marines is sent to investigate strange events at a research facility on Mars but find themselves at the mercy of genetically enhanced killing machines.
24. "The Fourth Kind" (2009)
Rotten Tomatoes score: 18%
This film uses a documentary-style narrative to tell the story of a psychiatrist in Nome, Alaska, who uncovers evidence of multiple abductions by an alien presence, challenging her beliefs and reality.
23. "Pandorum" (2009)
Rotten Tomatoes score: 30%
Two astronauts awaken in a hyper-sleep chamber aboard a seemingly abandoned spacecraft, with no memory of their mission or identity, and soon discover they are not alone.
22. "Silent Hill" (2006)
Rotten Tomatoes score: 33%
A woman desperate to find a cure for her daughter's illness takes her to a desolate town called Silent Hill, where they encounter supernatural phenomena and dark secrets about the town's past.
21. "Repo! The Genetic Opera" (2008)
Rotten Tomatoes score: 37%
In a futuristic world where organ failure is rampant, a biotech company offers organ transplants on a payment plan – and sends a repo man to reclaim organs from those who cannot pay.
20. "Cube Zero" (2004)
Rotten Tomatoes score: 42%
A prequel to the Cube series, this film explores the story of a technician working in the Cube maze who starts to question the purpose of his work and the morality of the deadly puzzle.
19. "Dark Water" (2005)
Rotten Tomatoes score: 47%
A mother and her young daughter move into a rundown apartment building, where they are plagued by mysterious water leaks and a dark, haunting presence.
18. "Pitch Black" (2000)
Rotten Tomatoes score: 59%
A transport ship crash-lands on a sun-scorched planet where a dangerous escaped convict, among other survivors, encounters a lethal alien species that emerges in the darkness.
17. "The Signal" (2007)
Rotten Tomatoes score: 59%
A mysterious transmission that turns people into killers invades every cell phone, radio, and television, causing chaos and turning the city into a mix of technological horror and psychological terror.
16. "Carriers" (2009)
Rotten Tomatoes score: 64%
Four friends fleeing a viral pandemic soon learn they are more dangerous than any virus as they struggle with the fact that the virus infects those who simply get too close.
15. "A Scanner Darkly" (2006)
Rotten Tomatoes score: 68%
Set in a future where America has lost the war on drugs, an undercover cop, suffering from a split personality due to his 'scramble suit' and a new drug, starts to lose his own identity.
14. "28 Weeks Later" (2007)
Rotten Tomatoes score: 72%
Set six months after the original virus outbreak, this sequel follows the efforts to repopulate London, which go tragically awry when a carrier of the rage virus reignites the deadly epidemic.
13. "The Mist" (2007)
Rotten Tomatoes score: 73%
After a violent storm, a dense and mysterious mist engulfs a small town, trapping residents in a supermarket where they face otherworldly creatures and escalating tensions among themselves.
12. "Splice" (2009)
Rotten Tomatoes score: 75%
Two young, rebellious scientists defy legal and ethical boundaries by splicing together human and animal DNA to create a new organism, leading to unintended and horrifying consequences.
11. "Sunshine" (2007)
Rotten Tomatoes score: 76%
In a future where the sun is dying, a team of astronauts undertakes a critical mission to re-ignite the star, facing a series of psychological and physical challenges in deep space.
10. "Splinter" (2008)
Rotten Tomatoes score: 76%
A couple and an escaped convict are trapped in a deserted gas station by a parasitic creature that transforms its still-living victims into deadly hosts, leading to a desperate fight for survival.
9. "Dawn of the Dead" (2004)
Rotten Tomatoes score: 76%
A nurse, a policeman, a young married couple, and other survivors of a worldwide plague that produces aggressive, flesh-eating zombies take refuge in a mega Midwestern shopping mall.
8. "Cloverfield" (2008)
Rotten Tomatoes score: 78%
A found-footage style film where a group of friends in New York City document their struggle to survive during a catastrophic attack by a giant monster and its smaller, parasitic offspring.
7. "Triangle" (2009)
Rotten Tomatoes score: 79%
A group of friends on a yachting trip encounter a mysterious, abandoned ship, finding themselves stuck in a terrifying time loop with a series of grim encounters.
6. "Dog Soldiers" (2002)
Rotten Tomatoes score: 81%
A British squad on a training mission in the Scottish Highlands encounters a pack of werewolves, leading to a desperate fight for survival in an isolated farmhouse.
5. "28 Days Later" (2002)
Rotten Tomatoes score: 87%
After waking up from a coma in a deserted London, a man discovers that a contagious virus has spread, turning people into aggressive zombies, and joins a group of survivors navigating the post-apocalyptic landscape.
4. "Slither" (2006)
Rotten Tomatoes score: 87%
A small town is taken over by an alien plague, turning residents into zombies and all forms of mutant monsters, prompting a band of survivors to unite for the fight of their lives.
3. "The Descent" (2005)
Rotten Tomatoes score: 87%
A group of female friends on a caving expedition experience a terrifying journey into the depths of an unmapped cave system, finding themselves not alone and fighting for survival against a horde of subterranean creatures.
2. "District 9" (2009)
Rotten Tomatoes score: 90%
In Johannesburg, an extraterrestrial race forced to live in slum-like conditions on Earth suddenly finds a kindred spirit in a government agent who is exposed to their biotechnology.
1. "The Host" (2006)
Rotten Tomatoes score: 93%
In Seoul, a monstrous and seemingly unstoppable creature emerges from the Han River, capturing a man's daughter, leading to a desperate and chaotic quest by her family to rescue her.