Undercity of Sin

Undercity of Sin is a 2D RPG for players who want dark corruption stories with turn-based combat woven in. The tone is grim and explicit, built around loss of control rather than romance.

Story

Asuna Hoshizuki is a jobless dropout with little going for her beyond a loving mother and the family restaurant she helps run. When her ordinary life gets pulled into the underground city beneath her town, that small stability starts to fall apart under pressure from forces determined to break her down.

Gameplay

Players guide Asuna through a sandbox city, taking on turn-based battles while managing her exposure to corruption, mind control, and rape events that shift her stats and story path. Choices and encounters branch across the map, feeding into multiple endings depending on how much of herself she loses or holds onto along the way.

Features

• Turn-based combat layered onto open sandbox exploration
• Multiple endings shaped by how far Asuna's corruption progresses
• Pregnancy and prostitution systems tied into the world's power structure
• 2D character art with expressive reaction states