
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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About
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.
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English, French, Italian, German, Spanish - Spain, Russian, Simplified Chinese, Turkish
Engagement
Hours played at review time, across 31 reviews with recorded playtime.
Reviews
Visually, this was stunning. Narratively, it was a mess. I couldn't make any sense out of the story. The game lingered on the MC getting up in the morning, getting undressed, going to the bathroom, getting a shower, getting dressed... which is all fine and somewhat pretty, but it did it multiple times, taking up a lot of needless time with pointlessly. That would just be mildly annoying if the game hadn't then appeared to quickly skip entire scenes of dialogue that might have something to do with the actual plot. There is long descriptive narrative, entirely unneeded in a visual story and poorly formatted and confusing dialogue. Finally, in a huge personal pet peeve, later scenes refer to events from choices I did not make rather than from the choices I did. In the end, I had to abandon this game. Cannot recommend.
一款纯正德国造的欧美3D成人视觉小说游戏,由名为DoAdventures的工作室自研自发。这并非是一家初创公司,他们早在2024年便已经发布了处女作。可是,City of Sin - The Nocturne Files[Ep1]却并不像是有开发经验做出来的作品。 为何我能认定它是德国造?因为它的默认语言就是德语,其设置中标注上的并非是German,而是德国人自称的Deutsch。游戏带有机翻简体中文,质量不算好,但至少能靠猜,大致了解到剧情,应该是德语直接机翻的,不如英文直翻中文的质量好。 当从游戏中回到主菜单后,会跳回成德语;此外,设置中有一个“保存填写名称”这个选项一定要取消勾选,当手动存档需要输入存档名称时,不管用什么语言下都没法保存,保存那个按钮按不了;保存还记得要翻下面的页数,要跳过Auto页,在数字页面上才能手动存档。这就是我说的开发经验不足,游戏底层的逻辑都未做好。 它一反大多数欧美3D成人视觉小说喜欢用的校园题材,正如其名“罪恶之城”,游戏背景直接来到了社会上,以工作、业余生活和夜店混迹为主来体现如此罪恶之城。 本作是女性主角,流程比较干脆,几乎没有需要“回答”的地方,纯享剧情,当然也没有专门的H场面,是跟随对话通通带过。其中大致有三处剧情分叉点,简单的yes和no确定了这位女性主角的性取向,是与女伴玩蕾丝边还是正常的男女瑟瑟。 但是这三个分叉点并不会给剧情起决定性作用,前面脱衣舞厅选了看脱衣女郎或者自己的男伴(触发和女郎的拉拉,或和男伴的爱爱)并不会决定这个主角的性取向是啥,后面依旧会让玩家选择走拉拉还是正常路线。所以,两个周目就可以解锁全部瑟瑟内容啦! 其中我认为最顶的,应该就是有一段洗浴室上遇到的姐贵,茁壮的毛毛和满身的肌肉,全裸的对视,必然要经历的拉拉剧情,两周目都在这里放缓了对话速度慢慢看! [quote]欢迎关注我们的鉴赏家:[url=https://store.steampowered.com/curator/35402982/]走心评测[/url] ←遵从内心,写出真实感受 欢迎加入我们Steam组:[url=https://steamcommunity.com/groups/ZXPC]走心评测[/url]←点击加入,一起探索游戏的乐趣 喜欢这篇评论,也麻烦点个赞,让更多人能够看到![/quote]
I am here for the long ride. This has so much style and is sooooo classy! please make it a long story. I will be waiting for more!!!!
For fans of spicy female fatal interactive fiction, this game is off to a promising start. While I obviously wouldn't recommend it for those that want to avoid adult content, for those that are down with that, its got a good blend of action, sexy time, and personal character focused stuff. I'd give it a strong 3 out of 5 fights in the locker room.
[h1]神秘的地下俱乐部?见不得人的秘密?[/h1] 神秘的地下俱乐部,见不得人的秘密……聪明敏感的调查员,深入其中却越陷越深?离秘密和真相越近,是否会与道德与正义越远?究竟是坚守本性,揭开一个又一个阴谋,还是逐步沦陷,沉沦灯红酒绿之中? 《City of sin-the nocturne Files》是一款含有成人内容的欧美写实风格视觉小说。在游戏中,你将扮演深入秘密俱乐部调查的调查员凯特,在狂欢与激情的故事中,一步步挖掘背后的真相。 [h1]游戏内容上[/h1] 作为一款视觉小说作品,游戏几乎全程均以视觉小说的形式呈现,过程中将拥有丰富的选项,可供玩家决策,并在部分剧情点插入手机功能,虽然内容简短,但是丰富了表现形式。剧情流程比较简短,但到不算肤浅,剧情中对不同角色的人物形象塑造还行,故事还算留有悬念,不过当前内容并不完整还需要等待游戏后续更新完整内容。游戏的画面上还是不错的,角色建模精致风格各异。并且目前也更新了官方中文,虽然机器翻译质量中等,但阅读压力还是不大的。 [h1]成人内容上[/h1] 在这方面内容上,游戏建模制精致,角色细节塑造完好,角色服装搭配妆容风格丰富,要素充分,形象符合亚洲审美,节奏颇快,XP覆盖面广(还有百合)。不过从总量上来看,还不算丰富,期待后续的更新内容。 [quote]欢迎前来关注「 [url=https://store.steampowered.com/curator/45353266/] 𝗞𝗼𝗶𝗺𝗶𝗮𝗼🍁」 [/url] [u][b] 采撷旅途之叶,铭刻生命之诗[/b][/u][/quote]
这是一款欧美黄油。 画面建模妹子整的非常好看,身材也是正常体型,看着还是很不错的,就是男性建模稍差一些。 游戏的剧情是玩家扮演一名叫做凯特的女调查员,因为城市里有女性失踪,甚至是某个基金会的女金主都失踪了,所以引起了凯特所在组织的注意,于是组织派她去调查这个由议员开的俱乐部,然后发现下面隐藏的秘密--说白了就是让一个女的去调查萝莉岛,基本上就是白给了。 不过目前流程非常短,而且如果不特意选男性的话,女主其实就是和其他女角色OOXX。 玩法上是视觉小说,中途会让玩家选择是否相信某些角色之类的,从而触发不同的路线,虽然游戏没有完结但是猜也知道无非就是恶堕或者成功的设定。 当然要是无论怎么选都会失败至少也是尊重现实。(狗头) 出现的其他几个妹子也都很漂亮,哪怕是黑妹也是很nice的,但对话较多,而且游戏也没完结,快进了一下就直接结束了。 GHS内容非常少,大部分都是裸漏图而已,动图稍微有一点,但是类似过场,而且没有视角变换--看女的磨豆腐其实还是没啥意思的。 有中文,但是机翻很严重,语法也不通顺。 目前还在EA,所以非常短,妹子很好看,但是GHS没啥东西,不过据说后续会免费更新,对黄油感兴趣的可以试试。 [quote]欢迎关注『 [url=https://store.steampowered.com/curator/45525570/] 桃你欢心 [/url]』 [b] 桃影扶风评百戏,落墨如歌写人间[/b][/quote]
An engaging adult game where you have choices on your characters behavior, gender preferences, and adult partners.
отлично, но хочется продолжение
The making of a great game. it's worth playing. Great graphic and story
This AVN looks really promising. Quality is top tier and story is engaging. Episode 1 was quite short, the new episode 2 is promising. I am looking forward to the other episodes and the end of the story.
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Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
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