REC - Watch Order: Quarantine Films
The Quarantine films represent American adaptations that reimagine the REC concept for English-speaking audiences. While the first film closely follows the structure and plot of the original REC, it exists as a separate continuity with different characters.
Quarantine 2: Terminal shifts the outbreak to an airport setting and is an original sequel specific to the American version. These films can be enjoyed independently without knowledge of the Spanish versions, offering their own take on the infection outbreak concept.

Quarantine
A television reporter and her cameraman are trapped inside a building quarantined by the CDC after the outbreak of a mysterious virus which turns humans into bloodthirsty killers.

Quarantine 2: Terminal
A plane is taken over by a mysterious virus. When the plane lands it is placed under quarantine. Now a group of survivors must band together to survive the quarantine.
Other Film Series
Hellraiser
Supernatural body horror centered on a mysterious puzzle box and the sadomasochistic Cenobites led by Pinhead.
Invasion of the Body Snatchers
Four films exploring alien pod people replacing humans, each updating the concept for different eras and anxieties.
Nightmare on Elm Street
The iconic horror franchise following the burned child killer Freddy Krueger who stalks teenagers through their dreams.
Paranormal Activity
A found-footage horror franchise following the demonic entity Toby's terrorization of the Rey family across multiple generations.
Saw
A horror franchise centered on the elaborate death traps and moral philosophy of serial killer John Kramer, known as Jigsaw.
The Omen
A supernatural horror franchise following the Antichrist Damien Thorn from his sinister origins through his rise to power, plus a modern remake.