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Completed v1.3.1

SiNiSistar 2

4.7
(132 votes)

Game Information

Developer

Nennai 5/Uu

Version

v1.3.1

Engine

Unity

Release Date

Dec 21, 2025

Last Update

Jan 13, 2026

Censorship

Censored

Overview

SiNiSistar 2 is a 2D side-scrolling action game for players who want dark horror combat with adult content woven into a monster-hunting setting. The tone is grim and unflinching, built for a mature audience rather than a casual one.

Story

In the cursed town of Alcezon, an exorcist sister takes on the growing threat of monstrous creatures spreading through the region. Her main task is to investigate the cause behind their rising numbers, leading her into dungeons scattered across the surrounding area, while smaller quests tied to the town and its people surface along the way.

Gameplay

Players guide the exorcist through side-scrolling combat encounters, clearing dungeons tied to the main investigation and picking up side quests at their own pace. Enemies vary between the main storyline and optional quests, with different monster types tied to each path. Combat sits at the center of the loop, pitting the protagonist against creatures that combine physical threat with the game's horror-driven monster designs.

Features

  • Side-scrolling combat against a growing roster of monster enemies
  • Dungeon exploration tied to a central investigation with optional side quests
  • Costume and voice customization options for the protagonist
  • Adjustable difficulty settings including a harder combat mode

Installation

1. Extract and run.

Changelog

v1.3.1

  • ・Fixed a bug that caused the game to become unplayable under certain conditions when viewing the costume mod list
  • ・Fixed a bug where some “Hard” settings were not being applied

v1.3.0

  • ・Added the new costume mod “Rabian”
  • ・Added “Haruka Amachi” to the voice change feature
  • ・Added “Hard” difficulty
  • ・Other fixes

SiNiSistar 2

v1.3.1 Windows, Mac
Download v1.3.1
 

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