PCGame

Fallen Priestess: My Sister's Demonic Bloodline

Adult fantasy RPG with turn-based combat and a corruption storyline

BBQ大好き · Published by Saikey Studios, BBQ大好き · Released Nov 21, 2025

AdventureRPG

Reviews
Mostly Positive
72% of 662
Recent reviews
Mixed
68% of 16 in 30 days
Players
6
daily peak, Oct 28, 2026
Steam Deck
Playable
Last update on Steam
5 months ago
Apr 29, 2026
Minimum PC
GTX 640
4 GB RAM · 2 GB disk
Full requirements

What is Fallen Priestess: My Sister's Demonic Bloodline?

A single-player, 2D RPG set around the border town of Aslint, where Lloyd tries to save his sister Trina from her awakening demon blood. You gather ingredients, craft and upgrade gear, question townspeople, and battle monsters in dungeons, returning to town to tend to Trina's need for mana.

For you if...

  • +you enjoy gathering materials and experimenting with character builds
  • +you want branching routes with purity and corruption choices

Not for you if...

  • −you want adult content without sexual betrayal themes
  • −you prefer real-time combat to turn-based battles

What players say

72% of 662 reviews are positive · 68% of 16 in the last 30 days

Players praise the artwork and the amount of RPG content. Complaints focus on tedious progression and difficult requirements for unlocking adult scenes.

Screenshots and trailer

Fallen Priestess: My Sister's Demonic Bloodline screenshot 1

Fallen Priestess: My Sister's Demonic Bloodline system requirements

Minimum: GTX 640, 4 GB RAM, 2 GB of disk space.

As published by the developer.

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Minimum

OS
Windows 10 or later
Processor
Intel Core™ i3-2100 or similar
Graphics
GeForce™ GTX 640 series or similar
Memory
4 GB RAM
Storage
2 GB available space

Recommended

OS
Windows 10 or later
Processor
Intel Core™ i7-4600M or similar
Graphics
GeForce™ GTX 750 series or similar
Memory
4 GB RAM
Storage
2 GB available space

Does Fallen Priestess: My Sister's Demonic Bloodline have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Does Fallen Priestess: My Sister's Demonic Bloodline run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

  • Default controller config not fully functional
  • Shows Steam Deck controller icons
  • In-game text is legible on Steam Deck
  • Default graphics settings perform well on Steam Deck

PC version details

DRM
None declared on Steam
Controller
Keyboard and mouse
Platforms
Windows
Achievements
16
Steam features
Cloud saves, Family Sharing
Languages
Full audio: Japanese. Text only: Simplified Chinese, English, Korean, Traditional Chinese.

Does Fallen Priestess: My Sister's Demonic Bloodline use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam

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