The beauty of the “Alien” franchise is that it has always allowed room for filmmakers to play with their own aesthetics and themes. Ridley Scott’s taut, philosophical space-thriller “Alien” gave way to the sweaty, militarized machismo of James Cameron’s “Aliens.” David Fincher brought industrial Soviet aesthetics and psychosexual tension to the stylish “Alien 3.” Even the darkly whimsical French auteur Jean-Pierre Jeunet put his quirky stamp on “Alien Resurrection,” before Scott returned for the bloody, brooding prequels “Prometheus” and “Alien: Covenant.”

With “Don’t Breathe” and “Evil Dead” (2013) director Fede Álvarez at the helm of “Alien: Romulus,” it’s then no surprise that his version is a contained slasher flick drenched in goopy viscera, in which a group of scrappy youths are hunted down by an unknowable monster. Written by Álvarez and Rodo Sayagues, the screenplay is ruthlessly efficient while touching on recognizable themes from the series: pregnancy, feminine strength, and the clash between human and artificial intelligence.

Cailee Spaeny steps into Ellen Ripley’s Reeboks as our heroine, Rain, who only wants one thing, to see the sun. She’s trying to make her way off the Jackson Mining Colony with her “brother,” a synthetic, or droid, named Andy (David Jonsson) and transfer to the farming planet of Yvaga. But the corporation keeps moving the goalposts, and she hasn’t fulfilled her quota of hours in the mine. Knowing that the company will never do right by her, she joins up with a group of friends to scavenge for cryopods in a rogue Weyland-Yutani ship floating overhead, in hopes they can make their way to Yvaga.

Naturally, the Weyland-Yutani ship, recently ravaged by the events of “Alien,” is crawling with facehuggers and xenomorphs, and the friends are separated and picked off, impossible decisions are made, and all manner of unholy creatures come bursting forth from various bodily cavities.

At the center of the story is the relationship between Rain and Andy. She wrestles with the idea of leaving him behind when considering their plans, but then a security upgrade to his software, which allows him to access different parts of the ship (with two halves named for Romulus and Remus, the twins of Rome), reboots him into something colder and more calculating. Initially programmed by Rain’s late father to do what’s best for her, Andy’s new directive becomes finishing the mission for the company.

Andy comes under the sway of a very persuasive new character left behind from the previous massacre, a chewed-up, half- destroyed synthetic called Rook, with a surprisingly familiar appearance. With a performance constructed from a voice actor and facial scans, Álvarez has brought back to life a memorable but deceased actor from “Alien.”

There are surface pleasures to enjoy in “Alien: Romulus,” including the stunningly rich cinematography by Galo Olivares, the scuffed-up and worn practical sets lit with glowing reds, shiny with extraterrestrial mucus. Benjamin Wallfisch’s score keens and groans ominously, sometimes dipping into synthy electronic moments.

At the center is Spaeny as Rain, the locus of feminine intelligence. Her empathy complicates things, but her ability to read and interpret situations bests any synthetic calculation.

Álvarez gives Spaeny her hero moments, and she expresses the inner strength and utter determination to survive required of an “Alien” franchise heroine. Sometimes, that demonstration of sheer humanity and grit is all that’s required to make one of these films sing.

MPA rating: R (for bloody violent content and language)

Running time: 1:59

How to watch: In theaters