In a city where power is measured in secrets, Kate Adler is no stranger to deception.
Your Story, Your Choices, Your Gameplay
A sharp-witted investigator with a talent for navigating lies, she's handed a rare lead, an invitation to Nocturne, the clandestine club where the elite shed their masks and morality.
But Nocturne is just the beginning.
What starts as a simple surveillance job unravels into a deeper conspiracy, missing girls, falsified identities, and a city stitched together by corruption. From neon-lit penthouses to sewer tunnels, Kate must follow the clues through every layer of society’s rot.
Every lead is a choice. Every truth, a risk.
And the deeper she digs, the more Kate realises: she might not be the hunter after all.
City of Sin – The Nocturne Files is a choice-driven visual novel that blends investigative gameplay with narrative branching.
You’ll uncover clues, question motives, and decide who Kate can trust as you navigate a world where every decision has weight.
Gameplay Overview
🔹 Choice-Driven Storytelling: AVN branching dialogue options and player decisions that shape Kate’s path and relationships.
🔹 Multiple Endings: Outcomes vary based on your choices, from investigative success to moral downfall.
🔹 3D Visuals: High-quality DAZ renders and immersive lighting that bring each environment and character to life.
🔹 Interactive Exploration: Investigate scenes, follow leads, and uncover hidden truths through narrative choices.
🔹 Mature, Emotional Themes: Power, manipulation, desire, and consequence are explored through adult storytelling.
🔹 Episodic Expansion: Regular free updates continue Kate’s investigation and expand existing routes no paid DLC or hidden content.
Summary
Genre: Narrative / Visual Novel / Mystery
Themes: Investigation, Corruption, Adult Choices
Mode: Single-player
Content Updates: Free episodic expansions
Ongoing Support & Content
This release includes all currently playable chapters and major branching routes.
Future updates will add new episodes, scenes, and endings all included with your purchase at no additional cost.
No microtransactions, no paywalls, just an expanding world shaped by your choices.
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45842466/61ee04d89eb49f95ee10af699394d09a48272d87.jpg\"][/img]
Hey everyone, quick but exciting update!
[p align=\"start\"]Im now working on the final scene for the first release of City of Sin and I got the Steam Store Page approved.\nThis update is a big one and once this last batch of renders is done, all thats left is to slot in the remaining script and polish everything.[/p][p align=\"start\"]That means the first release is officially right around the corner.[/p]A quick favour (that helps a lot)
[p align=\"start\"]If youre supporting me Patreon or SubscribeStar, youll already receive City of Sin as part of your tier.\nYou do NOT need to buy it on Steam.[/p][p align=\"start\"]But, I would be incredibly grateful if you could wishlist the game anyway, even if you never plan to buy it there.[/p][p align=\"start\"]Wishlists help Steams algorithm show the game to new people, and the early support means the game gets a stronger launch and more visibility.[/p][p align=\"start\"]Its one of the simplest but biggest boosts you can give.[/p][p align=\"start\"] https://store.steampowered.com/app/4153410/City_of_Sin__The_Nocturne_Files_Ep1/?beta=1\"" style="color:#bb86fc;text-decoration:none;">City of Sin - The Nocturne files Episode 1 [/p][p align=\"start\"]Thank you so much in advance. It really does make a difference.[/p][img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45842466/58f9cd227e438e9f499d4f2a45006f18b83dff6e.jpg\"][/img]
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45842466/6d9d10c923884c0751c3ceec1b56727e6b1a428a.jpg\"][/img]
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45842466/84972e63fe3378bc6b515890148f3f09f4f1cab1.png\"][/img]
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45842466/98d44efacc956c5eae694bba4e846f930340cdec.jpg\"][/img]
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45842466/eaa075e6947b87295e10d54cc04b0cc1437dbf06.png\"][/img]
Final Note
[p align=\"start\"]Thank you again to everyone supporting me on here, Steam, Discord, or anywhere else.\nThis project has grown bigger and better than I initially planned, and seeing the excitement genuinely keeps me going.[/p][p align=\"start\"]The next announcement you see from me should be the release build date.[/p][p align=\"start\"]I\'m very, very close now.[/p][p align=\"start\"] DoAdventures / Kates sleepless writer[/p]Im officially working on the final scene for this first release of City of Sin.\nIts a big one (because of course it is), but once this scene is done, thats it all renders for this build will be complete.\n\n[img src=\"https://clan.fastly.steamstatic.com/images/45842527/7fd9564da92ddde7a4b1667246f287f128b13b9d.jpg\"][/img]\n\nAfter that, Ill move on to integrating the last of the script and doing a full pass to make sure everything flows the way it should. I\'m very close now.\n\n Current Content Stats\nRenders: 1,365\nAnimations: 7\nWords: 58,814\nEstimated Playtime:\n4.4 to 6.5 hours, depending on reading speed and route choices\n\n New Phone System\n[img src=\"https://clan.fastly.steamstatic.com/images/45842527/0e4ae41b9363ecef595c789380957af287e1d8c9.png\"][/img]\nThis build also includes the brand-new phone system, which isnt just visual dressing it now:\n\nActs as a choice interface in certain scenes\nShows messages, calls, and key info seamlessly inside the story\n\nFuture updates will expand it further with:\n\nA full Gallery\nCustomisable wallpapers\nAdditional preferences\nAnd the ability to initiate calls when appropriate in the narrative\nThis phone UI is going to become a core part of how the world unfolds in City of Sin and I might upgrade it further a better view.\n\nThanks for sticking with the project this has grown into my biggest, most ambitious release yet. I cant wait for you all to experience it.\n\n[img src=\"https://clan.fastly.steamstatic.com/images/45842527/0f4999330ac9e8174c7d173d346b19b5a2a83901.jpg\"][/img]\n\nFinal scene rendering now.\nScript integration next.\nI\'m almost there.\n\n DoAdventures
Hey everyone,
If youve enjoyed Jessicas Choices Origins or youre excited for whats coming next, Id love for you to join my official DoAdventures Community Group here on Steam:\n
https://steamcommunity.com/groups/doadventures
Thats where all the latest news, sneak peeks, and announcements for upcoming titles, including City of Sin & Jessica\'s Choices - Forced will be shared first. Youll also find development updates, polls, and behind-the-scenes previews as I continue expanding the Jessicas Choices universe and now The City of Sin
Joining the group is a great way to stay connected, share your thoughts, and be part of the growing community supporting these stories.
Thanks for being here, your support genuinely means the world and keeps these projects alive.
DoAdventures
Minimum Setup
- OS: OpenGL 2. DirectX 9. OpenGL ES 2. or WebGL
- Processor: Intel Core2 Duo or betterMemory: 500 MB RAMStorage: 3 GB available space
- Memory: 500 MB RAMStorage: 3 GB available space
- Storage: 3 GB available space
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