Back in 2023, we shared some of the inspirations behind our narrative horror Still Wakes the Deep, which inspired its themes and structure, both in its grounded ’70s setting and its more fantastical horror elements. We took inspiration from a wide variety of sources, from classic horror films like The Thing and Annihilation to more unusual sources like Kes and Rosemary’s Baby.

For our new story expansion, Siren’s Rest, we wanted to explore the Beira D oil rig in a whole new setting, which comes with its own set of inspirations. Set in 1986, 11 years after the events of the original game, you’ll play as saturation diver Mhairi, who sets off on a journey beneath the North Sea to discover what happened on the Beira D. The ocean is a rich vein for exploring all kinds of tales, and these are just a few things that helped us craft this new story:

Thalassophobia

The fear of deep water is the origin of the entire psychological palette of Siren’s Rest. And for any players who haven’t felt this… we hope that Siren’s Rest will give them a chance to get a taste of this phobia.

We trawled through hundreds of articles of people experiencing this condition, people creating art about it, portraying it in a variety of thrilling and sensual ways. One thing that struck us: many thalassophobic photographs juxtapose a human with some yawning abyss or some looming form. The feeling you have isn’t just that this is a scary setting – rather, you feel a sense of enveloping dread for the person. Whoever that person is in that photograph, no matter how nonchalant they appear… you feel that they are in way over their heads (literally). They are facing their doom. That sense of overconfidence against the unknowable depths is something we wanted to capture in the game.

Even just an image like this we found on Reddit of an oceanic abyss gets the creative juices flowing. Also, did you know that a thick mysterious cloud called a brine pool can form in the bottom of the sea that creates these strange images? We wanted to hold that tension, between beauty and dread, at the heart of every visual design choice.

‘Last Breath’ (2018) and Saturation Diving

Saturation diving – named for the technique used to extend how long a diver can remain underwater – is an extraordinary profession. Dangerous, meticulous, weirdly poetic – everything deserving art to be made about it. It’s as dangerous as an astronaut going on a spacewalk… but far darker and far less well known. You are under tremendous pressure, literally, that messes with your mental state. You see things. You hear things. And all you are is a tiny flickering flame amid the everdark. This tension, loneliness, and thrill  are all portrayed beautifully in the documentary ‘Last Breath’.

And for a more day-to-day explanation, just check out this Reddit AMA that was done a few years ago. Understanding what it means to live and work under such extreme conditions helped ground our narrative in real human stakes, even as the story veers into the surreal.

‘Blue Planet II –The Deep’

This episode of ‘Blue Planet II’ served as a powerful entry point for us into the mystery and otherworldliness of the ocean’s most unreachable places. Nature’s own level design and art design is off the charts! The strange colours, mysterious beings. Our wonderful Earth with its impossible underwater geographies provided us with a visual vocabulary for portraying the bottom of the sea not as some strange spectacle, but with this all-consuming silent awe…

Dante’s ‘Inferno’

As clear a metaphor as it gets, right? Dante’s descent through Hell, in gripping 14^th Century poetic language, of increasing delusion as one moves further into tender darkness – influenced how we approached the structure of Siren’s Rest.

“Love, which quickly arrests the gentle heart,
Seized him with my beautiful form
That was taken from me, in a manner which still grieves me.”

‘The Descent’ (2005)

This film is two decades old and still stands up incredibly well. It’s a Dante’s ‘Inferno’ story brought up to the modern-day. Definitely not for the faint-hearted, for sure! Its classic structure and masterful rhythm of making tense progress in unfamiliar, claustrophobic physical spaces is a huge inspiration.

Submerged corridors, the pitch-black crevices of the story’s setting, technical, sophisticated characters whose psyches are run ragged, the mix of terror and hope and dread – it’s all there.

‘The Lighthouse’ (2019)

A recent dark masterclass in isolation, yearning, and the mind tricks that these feelings can conjure up. The film portrays two men (played by Robert Pattinson and Willem Dafoe) unravelling under the weight of routine, myths, and their own strange company. Those parallel the emotional current running beneath Siren’s Rest – a deep, almost delirious human longing – for connection, for redemption, for closure…

A central relationship between two characters who are equally isolated, equally alone with their thoughts and expectations – that stuck with us. The surreal juxtaposition between the raw, unforgiving environment, the arcane chores needed for survival, and the distantly warm conjuring of lost memories… we certainly hoped to capture that.

The Unexplained Ocean Sound, “Julia”

Sometimes even just a sonic phenomena can serve as an inspiration. A low-frequency sound, recorded by NOAA on March 1st 1999 and dubbed “Julia”, remains unexplained. The sound was loud enough to be detected across the Pacific Ocean and lasted for about two minutes and 43 seconds. An absolute treasure trove of strange explanations exists, spanning from giant sea creatures to aliens, naturally.

Julia’s inclusion in our early discussions around Siren’s Rest served as a symbol of the unknown – the uncanny idea that something might be out there, massive or silent, beyond our comprehension…

Màiri Mhòr nan Òran

The Hebridean poet Màiri Mhòr nan Òran shares a name with our protagonist, and her work comprises much of the emotional tone of Siren’s Rest. Her verses, rooted in exile, land, and longing, speak to the cultural and personal ruptures at the heart of this new story. They anchor the narrative in a Scottish identity that feels both deeply local and profoundly mythic – a legacy we feel incredibly privileged to portray.

The Still Wakes the Deep: Siren’s Rest DLC expansion arrives today for Xbox Series X|S and Xbox on PC.