This is a very fast playing scenario with an otherworldly atmosphere. I had mistakenly believed that it would be set in the Mwangi Expanse based on the title. Rather it brings the Mwangi Expanse to the Pathfinders. Beyond the atmosphere that is established in the introduction the scenario holds little flavor of Golarion, the world Pathfinder is set in. Instead it gives the players a dungeon delve experience with some curious scenery. The plot is straightforward and role-play takes a back seat to set piece encounters. This may sound like a poor review, but I recognize that sometimes a scenario is needed where you set aside the role-playing and just kick the crap out of stuff. This is the scenario.

EDIT-I'm revising my review to four stars. I've run this scenario two more times since I first wrote the review. The players loved it, mostly because this time everyone rolled bad saves and delighted in their misbehavior. You will understand when you play it...

First, let me state that I was not that impressed with the scenarios 1-4, though I liked Silent Tide.
This one, however, is simply a blast. It could easily be adapted to CoC, Masque of the red Death or similar settings, as it succeeds in threading the thin line between fantasy and pulp horror.
Plus: Nick Logue delivers a great atmosphere.

I can't recommend this module enough. I loved running it and my players loved playing it. Even though it is a horror-themed module, I think it will appeal to most players.

There are definitely some Cthulhu inspired moments that drive the simple, but rich plot. The story is rather linear, however all the Easter eggs that can be found along the way help to flesh it out and give it a lot of character. What this module has going for it is mood & theme, and it has those in abundance.

There is something for every class to do here, with additional "shine" moments for a bard and wizard. Careful, thoughtful players will be rewarded for their exploration and clue gathering. The combats present a variety of challenges beyond straight forward hack-n-slash.

The faction missions require some thought & investigation and aren't just "gimme" points for finding scavenger hunt items. These missions build off the primary goal by introducing scenes & NPCs that reveal more of the plot or deepen the connection the player has to the story.

Can you tell I liked the module? It's awesome. I had read some negative things about the author in the forums regarding the gore/violence level in his games, but I don't feel that was the case here. Even if you are a squeamish DM or player, what horror-elements are in the module can be easily toned down or, if you like that sort of thing like I do, can easily be increased.

My only regret is that there aren't more modules like this.

The title here sums up the scenario elements. Great fun to run - would be an excellent Halloween game. It is a nicely self-contained scenario with a clear sense of urgency and an exciting conclusion. A tough and demanding adventure with plenty of flavour. Thanks Nic.