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City of Sin - The Nocturne Files

In a city where power is measured in secrets, Kate Adler is no stranger to deception. 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.

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Developer
DoAdventures
Publisher
DoAdventures
Release
January 3, 2026
211 days ago
Steam Reviews
Mostly Positive31 reviews71.0%

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About the Game

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.

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