Undercity of Sin: Cyberpunk RPG of Debt and Discovery

8/25/2026, 2:34:11 PM

Release date: 12/6/2025

Tags: #adventure #rpg #2d #cute #singleplayer #sexual-content #hentai #nudity

User Reviews

Score: 79%Mostly Positive
Review Count: 112 reviews
Fetched At: 8/25/2026, 2:34:11 PM

Reference prices

Japan

¥ 2,420 (JPY)

Steam JP

$12.99 (USD)

Steam Global

Live Store Snapshot

Body text may reflect the state at publication time. For the latest sale, price, and review changes, prioritize the live price panel, review panel, and the Steam store listing.

Japan Price: ¥ 2,420
Global Price: $12.99
Price in Your Region: ¥ 2,420Prices as Steam lists them per country. What you are actually charged depends on your Steam account settings.Regional prices checked: 29 Aug 2026
Sale Status: Regular pricing
Price Checked At: 8/30/2026, 8:12:01 PM

The price snapshot and review snapshot differ by about 126 hours. Because they are not always refreshed at the same time, confirm the latest Steam listing before making a purchase decision.

Key highlight

Explore a hidden cyberpunk city as Asuna Hoshizuki in Undercity of Sin, a 2D adventure RPG by Manten Kobo and Kagura Games. Uncover secrets and use your strength to pay off a debt in this single-player narrative.

Who this is for

Recommended for players who enjoy a story with a unique protagonist diving into the underworld to pay off a debt. If you're interested in a 2D RPG set in a cyberpunk underground world, be sure to check it out.

Details

Overview

Undercity of Sin plunges players into a gritty, hidden cyberpunk world beneath the surface. You step into the shoes of Asuna Hoshizuki, a strong-willed but currently jobless young woman. After a dangerous encounter with the yakuza lands her in deep debt to a powerful crime family, Asuna has no choice but to work for them. This path, however, leads her to uncover a secret, technologically advanced city concealed from the everyday world. To clear her name and settle her debts, Asuna must leverage her formidable strength within this clandestine urban landscape.

Highlights

Developed by Manten Kobo and published by Kagura Games, this title offers a unique 2D adventure RPG experience.
Players will explore a hidden cyberpunk city, a stark contrast to Asuna's ordinary life.
The game features a single-player narrative focused on Asuna's journey to pay off her debt and uncover secrets.

Who It's For

This game is geared towards players who enjoy 2D RPGs with a strong narrative focus, particularly those interested in cyberpunk settings and character-driven stories. It's also designed for an adult audience, given its mature themes and content.

Game Info

Undercity of Sin is a single-player, 2D RPG released on December 6, 2025. It is available in English, Japanese, and Simplified Chinese. The game is a paid title with a mixed reception from Steam users. Please check the latest Steam listing for current user reviews and pricing.