Alien: Romulus has been rated a 15 in the UK. In a not-so-surprising move, the BBFC has rated Alien: Romulus a 15 certificate here in the UK. The rating was given due to “strong horror, gore, language“. There is a pretty high threshold in the UK to achieve an 18 certificate. They are often given to entries in the Saw franchise for example.
Most Alien and Predator films, including both AvPs, were either given a 15 certificate when it was released theatrically or have been re-classified as a 15 for the home media market. Looking over the ratings, the only two films in the series to still be given an 18 certificate here are Aliens and Alien Resurrection.

The BBFC has given Alien: Romulus a 15 certificate.
This news comes a few weeks after Alien: Romulus was rated R in North America.
Thanks to R0mulu$ for the news.
The characters as well - teenagers are the hardest to care about. It's very important we care about the people being torn to shreds tauntingly. It has to feel tragic. It has to be a challenging watch - no one who's made to walk out will ask for their money back.
Fede's Evil Dead is one of only 2 films I've had to leave the screen to take a breather outside because of the violence/gore.
But I was fully expecting a 15 rating. Since the Alien Director's Cut was re-released in the cinema 20 years ago, all the Alien films have been 15 (including the Alien DC).
Sci-Fi really has to push the boundaries of horror to get an 18, like any Eli Roth type production.
PREDATOR retains its 18 on Blu-Ray and yeah THE PREDATOR is back to an 18 rating too.
My dad had all of the four movies on VHS, Special edition as well as the regular version of Aliens.
I used to have those VHS tapes!
For a long time Predator 2 was rated R18+ in Australia, and Alien3 was rated M15+. With later home releases, both films got re-rated as MA15+ - an intermediate rating which didn't exist when either film was first classified (Predator 2 got 18+ for drugs and nudity, Alien3 only had blood and bad language so got the lower rating originally).
Alien, Aliens, Predator and AvP are M15+ (recommended 15+) while all of the others are MA15+ (restricted 15+) in Australia. I expect Romulus to get MA15+.
I came across this funny article when looking for the Covenant rating
https://entertainment.ie/movies/movie-news/shout-out-to-the-10-year-old-who-asked-ifco-to-lower-alien-covenants-rating-so-he-could-see-it-227050/
Though I do wonder why my "The Predator" blu ray is an 18 when the film is a 15.
Something could have insane, over the top gore but I could understand a 15 rating but then I see they gave 'The Coffee Table' a 15 and I for certain would personally put it at an 18 (DO NOT READ if you ever plan on watching it)
Spoiler
I imagine Romulus will be impactful gore and, and like someone mentioned without sexual violence it's probably not gonna to merit an 18 these days based on what I've seen just going through their ratings I've the last 5 years.
I'm more of the "hope it has a good story" persuasion.
Yeah, sorry, their initial ratings were 18. I just looked under the home releases or their respective pages and those were brought down to 15.
Fede's Evil Dead is rated 18, yes. But it should be given the rape scene and the 50,000 gallons of blood they used.
I don't expect Romulus to be nearly as over the top in its brutality and gore as The Evil Dead lends itself to being, even with Evil Dead's more recent, more serious iterations.
I thought they were all rated 15 now.
Covenant is a 15 and is just about as gory as a film can get within the constraints of that rating, so I'm okay with it.