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The Duffer brothers' sci-fi horror series "Stranger Things" is scaring up ghosts of decades past. About a mysterious force unleashed on a sleepy town, the show is full of '80s artifacts. Here are 21 we've spotted so far.

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1. The show's poster tells you exactly what you're getting into, evoking movies like "E.T. the Extra-Terrestrial" and "Indiana Jones." It looks like there's even a Jedi. "Star Wars" is referenced a lot in the series.

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2. The title sequence is set to the tune of heavy '80s-style synthesizers, reminiscent of B-level horror movies of the time.

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3. Each episode represents a new chapter, suggestive of children's books of the time. The font even resembles that of the "Choose Your Own Adventure" series.

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4. The show opens with our heroes playing a rousing game of Dungeons and Dragons, which was so popular in the '80s it had a Saturday morning cartoon.

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5. They hop on their Realistic-branded walkie talkies -- looks like someone dropped a bundle at Radio Shack.

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6. They ride '80s-style bikes. The one we found with a green banana seat, bottom right, looks just like the one ridden by Lucas Sinclair (Caleb McLaughlin).

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7. A Mead-branded Trapper Keeper folder, which closes with velcro, can be seen in one scene along with a very '80s Pee Chee folder. You're not a child of the '80s unless you drew a mustache and goatee on the tennis player.

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8. Sheriff Jim Hopper, played by David Harbour, drives a Chevy Blazer. He sometimes seems to be channeling Indiana Jones.

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9. The Clash hit "Should I Stay or Should I Go," which appeared on their 1982 album Combat Rock, is weaved into the story. And the show's soundtrack is filled with memorable '80s tunes.

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10. Like other characters on the show, Lucas likes to wear Levi's corduroy jackets.

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11. Nancy Wheeler's boyfriend Steve Harrington, played by Joe Keery, is seen wearing these vintage Nike sneakers.

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12. The phones in the show are painfully era-appropriate. Here, Joyce Byers (Winona Ryder) dials a rotary phone. There are also some vintage cordless phones depicted as well as button-push ones.

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13. In this scene, you can see a phone booth!

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14. Remember puffy vests? Michael J. Fox wasn't the only one wearing them back in the day.

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15. Blink and you'll miss it, but Mike Wheeler, played by Finn Wolfhard, plays with his Rubik's Cube in one episode.

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16. Even the beer cans are right for the times. How did we survive in the pre-"wide mouth" era?

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17. This scene made us nostalgic for "Stand By Me," which shares some thematic similarities with "Stranger Things."
Also Read: River Phoenix’s Classic ’80s Movie ‘Explorers': 11 Things You Didn’t Know

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18. Whatever happened to wood-paneled station wagons?

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19. Can you see the movie poster for "The Thing" in the background?

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20. Look carefully and you'll find a Tom Cruise poster hanging on the wall of Nancy Wheeler's room. She's played by Natalia Dyer.

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21. Matthew Modine, whose rise to fame began with the '80s movies "Vision Quest" and Stanley Kubrick's "Full Metal Jacket," is himself a survivor of the era.
What other items from the '80s did you spot? Tell us in the comments or tweet @TheWrap.
Also Read: ‘Stranger Things': Here’s How the Netflix Hit Plays With Fans on Twitter