The Chinese Room follows up its BAFTA-winning first-person horror tale with a short but scary expansion that dives even deeper into mysterious territory.

Still Wakes the Deep cemented itself as for all the ways it nailed a strong sense of intrigue and horror while trapping you on an oil rig in the North Sea facing a supernatural force. It was linear and mostly guided, sure, but also did well to place you in the shoes of a blue-collar worker and everyday Joe just trying to get home – even presenting some of the most believable Scottish accents in a video game, probably ever.

It shouldn’t be shocking to learn then that, though a tad short, the new surprise Siren’s Rest DLC brilliantly balances similar emotional beats and scares once again, just from a completely new angle. It’s been over 10 years since the Beira D mysteriously went down, and you’re the diver searching for answers.

Getting the obvious out of the way immediately, though playable from the menu right after purchase, Siren’s Rest is the type of expansion that demands knowledge of the base game. While set over a decade after the events that put Caz and crew through the worst day of their lives, most of your time is spent picking through them with your comms link and camera, swimming through the Beira D’s dilapidated ruins and trying to piece together what happened.

It’s an interesting approach for developer The Chinese Room to take given how we as the player already know what happened. It means our new main character, Mhairi, spends a lot of time playing catch-up. And yet, the new underwater setting and her much different tone of voice help keep this adventure fresh.

I was genuinely taken aback by how much getting to explore familiar locations like the mess hall, cafeteria, and manager’s office from this new watery perspective overall felt. Having walked through these halls previously while dodging all manner of eldritch body horrors as Caz, Siren’s Rest allowed me to properly digest these locations and appreciate them at a much slower pace.

One of my only real complaints with the Still Wakes the Deep base game is just how quickly the crap hits the fan after the story begins which meant being given a brief period to get to know your crewmates before they descend into madness. Oddly it’s here, when discovering their bodies and taking pictures of them to give their families on the surface for closure, that I suddenly feel like I know them more.

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A lot of this comes down to the great voice performances, which are on par with what already came before. There are only three or four real characters (including yourself) that make up this DLC in total, but every actor does a great job at portraying a great sense of context and, when required, urgency as part of a story that took me just a little over an hour-and-a-half to complete. It’s made instantly clear how much of an intelligent, passionate person Mhairi is, which only made me empathise more with her personal reasons for wanting to explore the rig.

Siren’s Rest doesn’t do a lot to shake up the formula too much compared to the base game, although the scenarios you’re placed in really do make this more of a ‘swimming’ simulator as opposed to a walking one The Chinese Room is known for. This means regularly having to swim through tight corridors, tubes, and more in order to reach objectives, gaining speed by using conveniently placed pipes and other ephemera whenever a quick escape through such spaces is necessary. Other than this, the only new mechanic is a cutting tool, which is often needed to remove pathways of rust that have built up on the Beira D in the years since it first went down.

Fortunately, though definitely a lot shorter than the base game’s 5- to 6-hour runtime, there are a few fleeting moments in Siren’s Rest where time isn’t working against you and you’re afforded to explore. A lot of the time, this results in finding optional collectables or more bodies that may or may not explain what happened to missing members of the main cast from before – all worth it for players who really want to put together the full picture of Beira D’s catastrophic events and properly roleplay as Mhairi.

Being shorter does mean that the horror is more focused this time around, too, as The Chinese Room smartly plays its cards close to its chest before anything remotely resembling a stealth or action sequence shows up. Overall, I preferred this since it meant I could enjoy an unnerving atmosphere but also still take in the narrative texture the submerged location provides.

Siren’s Rest serves as an equally mysterious and oftentimes chilling coda to Still Wakes the Deep that brings extra weight and context to that original Beira D disaster. New mechanics like the umbilical cord tether, cutting tool, and swim boost give this shorter, more contained story a slightly different flavour, but much more impactful is the ability to explore previous horrors from a new underwater perspective at a slower yet still terrifying pace.

If you’re seeking answers, this brief follow-up adventure is well worth a dip. Just don’t expect them to be the exact ones you went in seeking.