City of Sirens: 5E+ Urban Adventures in the Eldritch Fallout

City of Sirens is a 500+ page campaign setting for 5E+ (2014 & 2024), integrating Lovecraftian mystery, retro-futurism, and Fallout dystopian humour into one irresistibly cursed experience. Build unforgettable urban campaigns with a complete city setting + city-builder toolkit, 6+ richly detailed districts, and a full level 1–7 adventure. 

Populate your world with new species, subclasses, mutations and the all-new Technologist class, plus unique eldritch tech, spells, monsters, and familiars. Comes with STL miniatures, voiceovers, soundtrack and VTT options as well!

All crafted by the award-winning team behind Tome of Hags, with over 2,000+ happy backers on Kickstarter and Zero Generative AI.

Three Books - One Giant Setting

City of Sirens comes in three books, packed with everything you need to build unforgettable urban adventures in the cursed city of Angler's Den.

• City of Sirens (~300 pages) - The Core Setting Book! A complete city at your fingertips, including a full Level 1–9 campaign adventure, city-building rules, 6+ fully realized districts with maps and modding tables, and a GM's Arsenal packed with eldritch tech, monsters, magic items, and NPCs. (It comes with the PDF of City of Sirens: Into the Nightmare - which continues the campaign up to level 18!)
• The Survivor's Guide (~100 pages) - The Core Player Book! Everything your party needs to thrive in Angler's Den, including the all-new Technologist class, Core Prototypes, Price of Progress tables, subclasses, species, familiars, permanent mutations, new spells, and equipment.
• The Sirenomicon (~100 pages) - The Lore Companion! Decipher the city's deepest secrets through in-game notes, recordings, and environmental storytelling. Hidden treasures and siren riddles await those who read carefully.

Big City Eldritch Adventures

Once a jewel of the Cerulean Empire, Angler's Den is now a post-apocalyptic port rotting at the edge of the Exanni Archipelago: a smuggler's haven under pirate-oligarchs, abandoned by the Imperial army, and cursed by Change radiation. Beneath its crumbling streets, an ancient annihilated civilization left something behind: the Pale, a radioactive fog seeping upward through buried ruins, mutating everything it touches. It is spreading.

At its source lives the Matron: a siren reshaped by centuries of eldritch radiation into something vast and broken, threading her influence through the fog and into the minds of the city's most vulnerable. 
Three forces now vie for Angler's Den: the chaos of the Pirate Anarchorporation, the cold order of the Cerulean Empire, and the Matron's patient, absolute ruin.

Only one can shape what this city becomes... if anything survives the choosing.

City-Building Card Decks

Deck of Denizens. Angler's Den is only as alive as the people who fill its streets, and the Deck of Denizens makes sure they're unforgettable. Each of the 50+ cards brings a fully realized NPC to your table in seconds: quick-use lore, stat block highlights, items, and spells, ready to drop into any scene. Pull one deliberately. Pull one at random when your players go somewhere you didn't plan for. Either way, the city feels lived in.
Works seamlessly in Angler's Den or any city your party calls home.

Siren's Trove Deck. Every one of the 50+ items from City of Sirens, in card form. Keep them behind the screen for quick reference, or hand them directly to your players as a reward and watch their faces when they realize what they're holding!

All-New City Creator System

Build your crooked city. Mod the entire city setting with ease, using quick-build tables that cover and inspire every pillar of city life: identity, geography, governance, economy, culture, demographics, and more. With thousands of unique combinations, no two campaigns will ever feel the same.

Populate it. Breathe life into your creation with ready-to-use NPCs for every occasion, and detailed quest prompts that ensure every class—not just bards, sorcerers, and warlocks—has a reason to dive into the adventure.

Ruin it. Unleash chaos with crisis tables for corruption, disasters, and decay. From plague and famine to crime waves, sieges, and full-scale warfare, you hold the power to watch your city burn… or crumble under its own weight.

Ready-to-Use Districts, Packed with Flavor

Dive straight into Angler’s Den’s beating heart. City of Sirens gives you 6+ fully realized districts, each bursting with intrigue, quests, and NPCs that make your world come alive.

Browse strange wares in The Frolic, sip spirits and chase thrills in The Distillery, or wander the haunting beauty of The Drowning Gardens. For grittier tales, sink into the alleys of The Run-Downs, hunt for cursed treasures and old gods in the Ship Graveyard, or climb into the rarefied air of the High City, where politics (and gravity) is the deadliest game of all.

Every district comes with plug-and-play content—main quests, side quests, encounters, and NPCs—that can drop seamlessly into any campaign.

New Class: Technologist

Invention has a price, and your genius is the currency. Embrace SCIENCE* and become a Technologist, a brainiac jack-of-all-trades who can replicate fighting skills, steal spellcasting traits, and even emulate the gifts of patrons and gods - before the inevitable side effects catch up. Lost limbs, strange mutations, unstable breakthroughs… brilliance was never meant to be safe.

Your creativity comes alive through Core Prototypes (inventions that channel raw ingenuity into traits, abilities, and impossible feats) and Price of Progress feats, wild mutations and enhancements: a welcome side effect of your scientific breakthroughs. 

New Mutation Mechanics

Dive into the infinite possibilities of Change radiation! Share your body with an intelligent symbiote as the Infested. Rise not scarred, but perfected, by radiation as the crab-like Carcinized... or embrace forced evolution and become Supermutated. 

Eldritch-Tech Weaponry

Unleash your creativity with a collection of strange and wondrous gear, each brimming with story and style. Wield the suggestive Ad-Sword, channel raw power through the Galvanizer Wrench, or see beyond the Pale with the Reef Devil Mask.

Tonic Magic: Power Your Adventures

Master over 20 new Fallout and Bioshock-inspired spells and magic potions! Channel raw power with Galvanic Smite, unleash scientific ruin with Arc Welding, or wield unstable genius through the devastating Unleash Change. For the dream-touched, explore the ethereal with Candlelight Vigil, Sleepwalking, or the chilling Succumb to Madness. And for those who bend time itself, the kairomantic arsenal offers spells like Timewalk, Chronal Dilation, and the reality-breaking Timefreeze.

Bold New Playable Species

The flesh is weak! Awaken as an Automaton, organic brain-organelles housed in uncanny metal shells, walking enigmas of flesh and machine. Conquer the halls of urban aristocracy as a Reef Devil, a haughty and refined member of merfolk society. Reclaim the city’s skies as a Vulture, strong and resilient birdfolk of the northern isles. Or claim the streets in your own way as one of 6+ brand-new species, with 12+ unique subspecies!

Vibrant Thematic Subclasses

Dominate minds and weave intrigue divine as a Sisterhood Cleric. Fight dirty in the alleys as a Gutter Monk. Stalk your prey and wear its essence as a Facewearer Ranger. Or embrace any of the other 10+ brand-new subclasses, each crafted to make every class thrive in the city!

Original and Unique NPCs

Forget the cookie-cutter tavern keepers and recycled quest-givers—City of Sirens fills your streets with wholly original NPCs designed to surprise and delight your players. Trade the tired “shady dealer” for a steampunk robot merchant, or swap predictable elf nobles for Lovecraftian merfolk hoodlums dripping with eerie charm. 

And for DMs who prefer to stay closer to classic high fantasy, we’ve included setting-friendly variants that blend seamlessly into your world, always familiar enough to fit, but with a sharp edge that makes them unique.

Unforgettable Monsters

Angler's Den never runs short of nightmares. Face the Imperial Kitchen Bot, a domestic machine repurposed for something far less civilized. Survive the many-eyed, many-armed fury of the Mutated Cutthroat, twisted beyond recognition by Change radiation. And pray you never cross paths with the Dread Revenant: a parasitic fungus that has very ambitious plans for the bodies it now calls home.

With more than 20 creatures, this book is a bestiary unto itself, packed with original mechanics and dripping with urban flavor, turning every alley, ruin, and skyline into a battlefield of unforgettable encounters.  

Programmable Robo-Eldritch Familiars

What’s better than slaying a monster in the alleys? Turning it into a loyal companion by your side! City of Sirens introduces 10+ brand-new familiars, each with unique quirks, abilities, and roleplay hooks to make them unforgettable. Program your own Robotic Servitor, half sidekick and half experiment. Curl up with a Dreamling and wander visions from the dream realm. Or carry the whimsical M1XX0: part brewery, part robot, entirely delightful. 

PS: These familiars don’t just follow you. They grow with you!

Exclusive Dice Sets

VTT Options

Both the setting campaign and the districts are packed with rich lore, memorable encounters, and the twisted complexity that only the cities can offer. And, like the rest of the manual, they come with plenty of VTT-ready resources, including dedicated Foundry, Alchemy, and Roll20 VTT Modules.

STLs

Bring the city to life at your table with 10+ exclusive, never-before-seen miniatures designed specifically for City of Sirens. These highly detailed STL files are designed to capture the grit, menace, and strange charm of the setting, giving your players striking visual anchors as they confront twisted creatures, cursed souls, and deals best left unmade.

Each STL is presupported and optimized for smooth, reliable 3D printing, so you can focus on storytelling, not troubleshooting.

Audiobook & Soundtrack

Experience the heart of City of Sirens in audio form.
All the essential quest notes, read-aloud text, monologues, dialogues and environmental storytelling have been brought to life by voice actress Autumn Holley, joined by a talented cast of voice actors. The result is a fully immersive audio companion you can play directly at the table for your players, or use to prepare for game night while commuting, working, or relaxing on the couch.
Running your session live or prepping between sessions? The audiobook helps the city breathe, speak, and come to life.

But that’s not all. Elevate your sessions and boss fights with City of Sirens’ Soundtrack, a collection of brand-new compositions created exclusively for this campaign by award-winning composers from the world of video games and film. Each track is designed to heighten tension, emotion, and atmosphere, turning every moment at the table into a true cinematic experience.

...And the Deluxe Edition! 

The ultimate City of Sirens experience, available exclusively through this Kickstarter. Everything in the standard edition, plus a stunning deluxe variant cover by Spikulec and the print edition of City of Sirens: Nightmare Mode (a bonus campaign for levels 10-18), plus more surprises waiting to be uncovered.

Playtest Materials

Dive into City of Sirens right now with our 40+ page free playtest pack, featuring the shapeshifting Onogokkoi species, the Carcinized mutation, the Paradoxical Hexweaver subclass, and a fully playable District: The Frolic, complete with maps, creatures, magic items, district tables, and NPCs.

Pay Over Time

Kickstarter now lets you split any pledge of $125 or more into 3 easy payments, so you can back the tier you really want without paying it all at once. Here's how the payment schedule works:

• June 11th: 1/3 of the pledge
• July 11th: 1/3 of the pledge
• August 11th: 1/3 of the pledge

Tiers

Tiers

Scroll down for a full visual breakdown of every tier and what's inside. A quick heads-up: taxes and shipping aren't included in your pledge: both will be collected separately through our Pledge Manager once the campaign ends.

PDFs - €35

​​The PDFs of City of Sirens, the Survivor’s Handbook, and the Sirenomicon, plus soundtrack and complimentary STL!

• City of Sirens - Digital PDF
• Survivor’s Handbook - Digital PDF
• Sirenomicon - Digital PDF
• City of Sirens - Soundscape
• Dreamer Siren STL
• Wallpaper - Digital

Dual Book - €75

Get the physical books of City of Sirens, the Survivor’s Handbook, plus the digital edition of both the Sirenomicon and the Deck of Denizens.

• City of Sirens - Hardcover + Digital PDF
• Survivor’s Handbook - Softcover + Digital PDF
• Sirenomicon - Digital PDF
• Deck of Denizens - Digital Cards
• City of Sirens - Soundscape
• Dreamer Siren STL
• Wallpaper - Digital

Triple Book - €100

Get all three printed books, City of Sirens, the Survivor’s Handbook, and the Sirenomicon, in print!

• City of Sirens - Hardcover + Digital PDF
• Survivor’s Handbook - Softcover + Digital PDF
• Sirenomicon - Softcover + Digital PDF
• Sirenomicon - Digital PDF
• Deck of Denizens - Digital Cards
• City of Sirens - Soundscape
• City of Sirens - Audiobook
• Dreamer Siren STL
• Wallpaper - Digital

Digital Deluxe Bundle - €125

Get all the digital gameplay content of the campaign, including your choice of VTT module.

• City of Sirens Deluxe - Digital PDF
• Survivor’s Handbook - Digital PDF
• Sirenomicon - Digital PDF
• Deck of Denizens - Digital Cards
• City of Sirens - Soundscape
• City of Sirens - Audiobook
• Digital Tokens Bundle
• Digital Maps Bundle
• VTT Bundle
• STL Bundle
• Digital Handouts
• Printable Character Sheets
• Name in Credits
• Tiny Quests Digital Bundle
• Big Empty Blue #1-2 - Digital

City of Sirens Core - €149

Get everything you need to run City of Sirens at your table, plus the Change Mutation resin dice set.

• City of Sirens - Hardcover + Digital PDF
• Survivor’s Handbook - Softcover + Digital PDF
• Sirenomicon - Softcover + Digital PDF
• Deck of Denizens - NPC Cards + Digital
• Mutation Dice Set
• DM Screen
• City of Sirens - Soundscape
• City of Sirens - Audiobook
• Digital Tokens Bundle
• Digital Maps Bundle
• STL Bundle
• Digital Handouts
• Printable Character Sheets
• Name in Credits
• Big Empty Blue #1-2 - Digital

Limited Edition Deluxe - €250

Treat yourself to the Deluxe edition of City of Sirens, the hardcover editions of all the other books, and your choice of VTT module, plus the Change Mutation resin dice and the Technologist metal dice sets! 

Get everything you need to run City of Sirens at your table, plus the Change Mutation resin dice set.

• City of Sirens Deluxe - Hardcover + Digital PDF
• Survivor’s Handbook - Hardcover + Digital PDF
• Sirenomicon - Hardcover + Digital PDF
• Deck of Denizens - NPC Cards + Digital
• Technologist Dice Set
• Mutation Dice Set
• DM Screen
• City of Sirens - Soundscape
• City of Sirens - Audiobook
• Digital Tokens Bundle
• Digital Maps Bundle
• STL Bundle
• VTT Bundle
• Digital Handouts
• Printable Character Sheets
• Name in Credits
• Tiny Quests Digital Bundle
• Big Empty Blue #1-2 - Digital

Creator Tiers

Item Merchant - €395

Let's make some magic - together! Collaborate directly with us to create a custom item to be featured in the book! Plus, you'll receive all the rewards included in the Limited Edition Deluxe!

• Create an item with us!
• City of Sirens Deluxe - Hardcover + Digital PDF
• Survivor’s Handbook - Hardcover + Digital PDF
• Sirenomicon - Hardcover + Digital PDF
• Deck of Denizens - NPC Cards + Digital
• Technologist Dice Set
• Mutation Dice Set
• DM Screen
• City of Sirens - Soundscape
• City of Sirens - Audiobook
• Digital Tokens Bundle
• Digital Maps Bundle
• STL Bundle
• VTT Bundle
• Digital Handouts
• Printable Character Sheets
• Name in Credits
• Tiny Quests Digital Bundle
• Big Empty Blue #1-2 - Digital

Worldbuilder - €595

The ultimate tier for the ultimate supporter! Collaborate directly with us to create a custom monster, NPC, spell, feat, or other unique content that will be featured in the book! Plus, you'll receive all the rewards of the lower tiers.

• Get your own ideas into the book!
• Create an item with us!
• City of Sirens Deluxe - Hardcover + Digital PDF
• Survivor’s Handbook - Hardcover + Digital PDF
• Sirenomicon - Hardcover + Digital PDF
• Deck of Denizens - NPC Cards + Digital
• Technologist Dice Set
• Mutation Dice Set
• DM Screen
• City of Sirens - Soundscape
• City of Sirens - Audiobook
• Digital Tokens Bundle
• Digital Maps Bundle
• STL Bundle
• VTT Bundle
• Digital Handouts
• Printable Character Sheets
• Name in Credits
• Tiny Quests Digital Bundle
• Big Empty Blue #1-2 - Digital

Stretch Goals

Great news: we've reached our initial funding goal! We're so grateful to everyone who has backed the campaign and helped spread the word about City of Sirens. We have plenty of cool additional features in mind. Please take a look and consider supporting us with a pledge or by sharing the campaign on social media!

Community Stretch Goals

Add-Ons

Add-ons are the perfect way to personalize your pledge even further! More than thirty add-ons are waiting for you, from items and NPCs to fully-fledged adventures.

Digital Books & Resources

Books & Resources

Accessories

Digital Accessories

You can add on individual items to your pledge after you select a pledge level over on the right ->

Timeline & Shipping

When will you be charged? We expect this project to ship in Q2 of 2027. We’ve provided rough shipping estimates below, but we’ll wait to charge for shipping until shortly before fulfillment actually begins. This means we don’t have to guess at shipping costs and can charge you exactly what it actually costs, which is fairer for everyone.

• United States: 10 EUR
• Mexico: 10 EUR
• UK: 10 EUR
• Europe: 14 EUR
• Canada: 14 EUR
• Australia: 14 EUR
• Rest of the World: 14 EUR

These prices are estimates and based on a single standard hardcover volume of 300 pages. Any applicable sales taxes and VAT will also be handled at that time. The shifting geopolitical landscape can cause shipping costs to fluctuate heavily.

Retailers

Do you want to stock our product? Contact us at bigemptyblue@gmail.com

Team

Quill - Content Mastermind: Quilaztli Ytza (aka Quill) is a young Tritonid, a species of nomadic amphibious creatures inhabiting the Big Empty Blue. She is the best and most cutting-edge DM on Odir (her words), and she loves to create new content that pushes the boundaries of her favorite TTRPGs.

Marco A. Piana - Creator, Lead Writer: Marco is an award-winning writer and educator. He is a huge fan of fantasy, horror, and sci-fi novels, video games, and tabletop RPGs. When he's not busy writing, teaching, or researching, Marco enjoys cooking, swimming, napping, gaming, and, when time allows, LARPing. This will be his 16th Kickstarter campaign, successfully running and fulfilling the previous ones in the past four years.

Caterina Capogrossi - Lead Artist: Caterina is an artist with a passion for comics, animation, and games. She lives in Italy and currently works as an illustrator and 2D artist. When she's not busy drawing, she loves to play RPGs, go for long walks in the woods, visit old castles, and read weird local folklore and legends. This will be her 16th Kickstarter campaign!

Giulio Goglia - Graphic Design: loves cartoons, story-driven videogames and every type of comic. Currently freelancing as graphic designer and game illustrator in indie projects, Big Empty Blue was his first professional experience, strives to become better (nearly) every day.

Rouel Miniatures - 3D STLs: 3D Artist with 4 years of experience specializing in Digital sculpting, preparing beautiful STL miniatures ready for 3D printing and collaborating with more than 10 successful Kickstarter campaigns.

Our Partners

100% Human-Made Content

Real art, coming from creative people with mushy brains and meaty hands, is awesome! Our team has made a commitment not to use AI-generated art and writing in our projects. With the ongoing rise of AI content, we want to support the artist and game design communities and their incredible craft.

Here are some of the guest artists whose work will appear on the resource so far (in alphabetical order):

• Bee Aitken - Writer, Game Designer
• Dave Allsop - Visual Artist
• Caterina Capogrossi - Lead Artist
• Corzanth - Writer, Game Designer
• Anthony Cournoyer - Visual Artist
• GreyJay - Music Composer
• Zuza Gruzlewska aka Spikulec - Visual Artist
• Autumn Holley - Voice Actor
• Vagelio Kaliva - Visual Artist
• Aleksandra Kolebska - 2D Animator (the animator of our intro short!)
• Eric Lofgren - Visual Artist
• Mikhail Palamarchuck - Visual Artist
• Tigran Papazyan - Music Composer
• Rajat Tiwari - Music Composer
• Tunetank - Music Composer
• Vitalsource - Music Composer (the tune of our intro short)
• Zen - Conlang Expert

Explore the Big Blue

The Big Blue is a vast ocean world connected to Earth and other planets through a series of broken portals. The planet is home to many unique sapient races and cultures that evolved from the seas, the skies, the swamps, and the hollow volcanic lands. The Tritonid Dominion is a federation of trade routes controlled by the Tritonids, a race of nomadic sea amphibians. In the West, the aggressive Iguanid Empire promises safety and order in exchange for taxes and obedience. In the north, the brutal Vulture Clans rule with an iron fist, raiding, pillaging, and trading the spoils of conquest with nearby populations. In the depths of the Blue, the Deep Ones scheme endlessly, studying old technologies and civilizations to keep their intellectual primacy over the other races.

Amid it all lies the mystery of the statue islands, scattered all over the ocean. And the looming threat of the Helix: an ancient, massive artifact roaming around the Blue and destroying everything in its path.

Join the Community!

Fulfilment, Refunds and Cancellations

We understand that plans change! You’re welcome to modify or cancel your pledge at no cost throughout the campaign. After the campaign ends, if you need to make changes or request a refund, just reach out to us via our contact form, and we’ll be happy to help. Here’s how it works:

• Digital pledges can’t be refunded once we’ve sent out any PDFs (including betas and works-in-progress).
• Shipping fees can’t be refunded once your order is getting ready to ship.
• After the campaign ends, a small 10% fee will be deducted from refunds to cover platform and transaction costs.
• If PDFs have already been delivered, their value will be deducted from any physical pledge refund.

If your rewards arrive damaged or if something goes wrong with your delivery, let us know as soon as possible! We’ll work with you to find the best solution and replace damaged items if they’re available. We’re here to make sure everything goes smoothly!

Fulfilment support ends six months after the shipping phase begins. Late surveys will be fulfilled monthly. Tracking is not guaranteed.

Co-Creation Add-Ons: Terms and Details

We’re so excited to work with you to bring your original ideas to life in our resource! Here’s how it works: Once we reach our funding goal, we’ll get in touch to collaborate and make sure your idea fits seamlessly into the lore (if you’d like). Each commission will be handled one at a time, and in the order they’re received, starting after the Kickstarter campaign is over.

Idea integration guidelines:

• Original ideas only. Your character, spell, player option or item must be your unique creation, free from any copyrighted or trademarked content.
• Once we hit our funding goal, we’ll reach out to you to start the process and make sure your idea fits perfectly into the world of City of Sirens (if you’d like some help with that).
• We’ll begin working on character commissions after the main project is wrapped up to ensure everything is done with care.
• Each commission includes one round of review.
• No advertisements, and everything must remain PG.

By purchasing a co-creation bundle or add-on, you agree that your contributions will be fully integrated into our world, meaning we can use them in our publications, marketing, and on social media. 

We can’t wait to see what you create and work together to make your character part of this epic journey!

A Note on Designs 

Everything you see on this page — dice, cards, screens, and accessories — is based on early prototypes. Final designs may vary as we refine and improve each item before production. We'll always share updates as things evolve, and we're committed to making every physical product as beautiful as possible.