If you are a fan of sci-fi movies or TV shows, then you know that a good villain can make or break the story. Whether it's an alien invasion, a mad scientist, or a rogue AI, the villain is often the driving force behind the plot.

If you think you know your sci-fi villains, why not put your knowledge to the test with this sci-fi villain crossword? We've compiled a list of some of the most iconic villains from sci-fi history, from classics like Star Wars and The Terminator to more recent hits like Stranger Things and The Mandalorian.

Star Wars

No list of sci-fi villains would be complete without mentioning Star Wars. From Darth Vader to Emperor Palpatine, the Star Wars franchise has some of the most iconic villains in movie history.

1. Darth Vader - This Sith Lord needs no introduction. With his iconic breathing and menacing black suit, Darth Vader is one of the most recognizable villains in cinema.

2. Emperor Palpatine - The ultimate puppet master, Palpatine is the mastermind behind the rise of the Galactic Empire and the downfall of the Jedi.

3. Boba Fett - Although he doesn't have much screen time in the original trilogy, Boba Fett has become a fan favorite thanks to his cool armor and bounty hunter status.

The Terminator

The Terminator franchise is all about time travel and killer robots, so it's no surprise that it has some of the most iconic villains in sci-fi history.

1. T-800 - Played by Arnold Schwarzenegger, the T-800 is a cyborg assassin sent back in time to kill Sarah Connor, the mother of the future resistance leader.

2. T-1000 - The T-1000 is a more advanced Terminator model made of liquid metal. It can shape-shift and regenerate, making it nearly impossible to stop.

3. Skynet - The sentient AI that created the Terminator robots, Skynet is the ultimate villain in the Terminator franchise.

Stranger Things

Stranger Things is a modern sci-fi classic, with a loveable cast of characters and some seriously creepy monsters.

1. Demogorgon - The main villain of the first season, the Demogorgon is a terrifying creature from the Upside Down that feeds on human flesh.

2. Mind Flayer - The Mind Flayer is a powerful psychic entity that controls the monsters of the Upside Down and seeks to invade our world.

3. Billy Hargrove - While not technically a monster, Billy's possession by the Mind Flayer in season 3 makes him a formidable villain.

The Mandalorian

The Mandalorian is a recent addition to the Star Wars franchise, but it has already introduced some iconic villains.

1. Moff Gideon - Played by Giancarlo Esposito, Moff Gideon is a former Imperial officer who seeks to capture the Child (aka Baby Yoda) for his own nefarious purposes.

2. The Client - The Client is an unnamed Imperial officer who hires the Mandalorian to capture the Child.

3. IG-11 - While IG-11 is ultimately a hero in the series, the assassin droid starts off as a villain before being reprogrammed by the Mandalorian.

Conclusion

Related video of Sci-Fi Villain Crossword: Test Your Knowledge of the Most Iconic Sci-Fi Villains