Undercity of Sin
Turn-based RPG about repaying yakuza debt in a cyberpunk undercity
Manten Kobo · Published by Kagura Games · Released Dec 5, 2025
- Reviews
- Mixed
- 65% of 75
- Recent reviews
- Not enough recent
- Players
- 0
- daily peak, Oct 28, 2026
- Steam Deck
- Playable
- Last update on Steam
- 10 months ago
- Dec 5, 2025
What is Undercity of Sin?
This single-player, 2D adult RPG follows Asuna Hoshizuki as she works for a crime family to repay a debt. You explore eight procedurally generated dungeons in a hidden cyberpunk city, fight machine soldiers in turn-based battles, and unlock active and passive abilities through a skill tree.
For you if...
- +you enjoy corruption themes in adult role-playing stories
- +you prefer straightforward RPG systems over complex combat mechanics
Not for you if...
- −you want handcrafted dungeons rather than randomly generated layouts
- −you prefer adventures without sexual content or nudity
What players say
65% of 75 reviews are positive
Players praise the heroine's design and the story's humor. The most common complaint is the inconsistent art styles across adult scenes.
Screenshots and trailer
Undercity of Sin system requirements
Minimum: DirectX 9 GPU, 4 GB RAM, 4 GB of disk space.
As published by the developer.
Can my PC run Undercity of Sin?
Tell us your graphics card once and every game page will answer this for you.
Set up my PC →Minimum
- OS
- Windows® 8/8.1/10/11
- Processor
- Intel Core2 Duo or better
- Graphics
- DirectX 9/OpenGL 4.1 capable GPU
- Memory
- 4 GB RAM
- Storage
- 4 GB available space
- DirectX
- Version 9.0
- Notes
- 1280x768 or better Display. Lag may occur from loading menus or maps. Turn off other programs before running the game.
Recommended
- OS
- Windows 11/10/8
- Processor
- 2+ GHz Processor
- Graphics
- OpenGL ES 2.0 hardware driver support required for WebGL acceleration. (AMD Catalyst 10.9, nVidia 358.50)
- Memory
- 4 GB RAM
- Storage
- 4 GB available space
- DirectX
- Version 9.0
- Notes
- 1280x768 or better Display. Lag may occur from loading menus or maps. Turn off other programs before running the game.
Does Undercity of Sin have co-op or multiplayer?
No: single-player only, no multiplayer modes declared.
Does Undercity of Sin run on Steam Deck?
Playable Playable: it runs on Steam Deck with some adjustments.
- Some in-game text is small and may be hard to read
- All functionality is accessible with the default controller configuration
- Shows Steam Deck controller icons
- Default graphics settings perform well on Steam Deck
PC version details
- DRM
- None declared on Steam
- Controller
- Keyboard and mouse
- Platforms
- Windows
- Steam features
- Family Sharing
- Languages
- Text only: English, Japanese, Simplified Chinese.
Does Undercity of Sin use AI-generated content?
No AI-generated content is disclosed on the game's Steam page.
Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam
