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.
Episode 2 of City of Sin The Nocturne Files is officially underway.
Ive just pushed a hotfix update to address a small issue, and with that out of the way, development on Episode 2 has now properly begun.
Where Episode 1 focused on tone, character, and laying the foundations of Kates world, Episode 2 shifts gears.
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45842466/307eab4d9ad6d3654b3c98b83103fa6d784c498b.jpg\"][/img]
What Episode 2 Is About
Episode 2 expands player agency and begins introducing repeatable encounters, systems that let players re-engage with characters and situations over time, rather than experiencing everything once and moving on.
At launch, this will likely begin with two repeatable encounters, but more importantly, it establishes the framework that allows these systems to grow and evolve across future episodes.
This means:
More player-driven choices outside of linear story beats
[/*]Optional encounters that can escalate over time
[/*]A world that reacts to what you pursue and what you avoid
[/*]
Why This Matters
City of Sin is designed as a slow-burn series, where each episode builds on the last rather than resetting the board. Episode 2 is where those longer-term systems start to take shape.
Some of the groundwork you saw in Episode 1 with the phone, character connections, and locations begins to pay off here.
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45842466/e53aa2b0259a8b193b2595c57b91601b9d0a5dfe.jpg\"][/img]
Development Status
Episode 2 is in active development
[/*]Systems and structure are being prioritised first
[/*]New scenes, encounters, and escalation will follow
[/*]
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45842466/0a8038028b10d2e670d898b7574a86257bbb21f1.jpg\"][/img]
Ill be sharing progress updates and previews as things solidify but please see some early images from Episode 2 are already attached to this post.
Thank you to everyone whos played, reviewed, wishlisted, and shared feedback so far, it genuinely helps shape where this goes next.
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45842466/beaa6d2da6b2531a788e09e078c9848a2f980b3e.png\"][/img]
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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