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…
Undercity of Sin is an adventure developed by Manten Kobo, released 6 December 2025 on PC (Microsoft Windows).
What Undercity of Sin is
Undercity of Sin is an adventure game developed by Manten Kobo and released in 2025. It was published by Kagura Games. It is available on PC (Microsoft Windows) only. It runs on RPG Maker MV.
The premise, in the publisher's words
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.
How it plays
It is played from a bird view / isometric perspective. Its themes are science fiction. It is a single-player game with no multiplayer component.
What it launched against
Undercity of Sin launched on 6 December 2025, within three weeks of Metroid Prime 4: Beyond, Routine, Kirby Air Riders and Marvel Cosmic Invasion.
Released around the same time: Metroid Prime 4: Beyond, Routine, Kirby Air Riders, Marvel Cosmic Invasion.
Official trailer
Sourced from the publisher’s YouTube channel.
Screenshots
All media
Quick answers
Undercity of Sin — frequently asked questions
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