Manten Kobo

Undercity of Sin

Experience a story of crime and gang warfare as you fight your way through eight procedurally generated dungeons full of machine soldiers and superpowered weaponry, and explore a skill tree with numerous ways to power up your character as you overcome this traditional turn-based RPG.

Released: 6 December 2025
Developer: Manten Kobo
Publisher: Kagura Games
Engine: RPG Maker MV
Platforms: PC (Microsoft Windows)
Genres: Role-playing (RPG) · Adventure

Undercity of Sin

Quick answers

System requirements 4 GB RAM Download size 4.0 GB

Undercity of Sin

The story

Asuna Hoshizuki is beautiful, loudmouthed, and hits like a freight train. A jobless dropout, she doesn't have much of a life, but she has a loving mother and a family restaurant she helps out at. But after a run-in with a band of yakuza, she finds herself deep in debt to a crime family. With a net worth amounting to a few loose coins and some pocket lint, she's left with no choice but to work for the very men she's indebted to. But in the process, she learns about a secret underground world, a cyberpunk city hidden from sight. Now to pay off her debt, Asuna will have to use her incredible strength to help the Matsuba Clan seize control of the crime-ridden Undercity.

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