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Fallen Priestess: My Sister's Demonic Bloodline

Fallen Priestess: My Sister's Demonic Bloodline

Embark on a thrilling quest to defeat the Demon King and save Trina from the curse of her demon blood. Protect her from those who seek to corrupt and steal her from you. Conquer dungeons, battle dangerous foes, and master unique Synthesis skills in this intense adventure!

Released Nov 21, 2025 Developer BBQ大好き Publisher Saikey Studios, BBQ大好き Platforms Windows HentaiSexual Content2DFantasyPixel Graphics
View on Steam ↗ $15.19 (US · as of 2026-09-26)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-25.

73.1%positive640 reviews
Recommended · 8 found this helpful

“I feel like people who leave negative reviews are a bit crazy. Look, I am not fan of NTR. These 22 hours I have are from doing pure route, and there is A LOT of stuff to do in pure route. And I am still just now reaching final boss. Farming (plants), dungeons, farming…”

— a player, Steam review · 29 hrs played
Recommended · 1 found this helpful

“It's a pretty good game with some beautiful art, plus the bugs it was released with are now gone, so you can play it without issues”

— a player, Steam review · 44 hrs played
Not recommended · 4 found this helpful

“NTR driven plot is not what I expected. The game meets bare minimum of RPG gameplay... And if the gameplay is bad, I'd want a convenient 'unlock all' button. But there is none...”

— a player, Steam review · 1 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-08 via SteamCharts.

827all-time peak
0 250 500 2026 225 avg · Nov 2025

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.

16achievements
13.6%median completion
3.7%rarest: Gluttony
66.6% of players 45.2% of players 36.7% of players 24.1% of players 22.9% of players 18.3% of players 17.6% of players 14.7% of players 13.6% of players 11.8% of players 11.2% of players 10.0% of players 8.2% of players 4.2% of players 4.1% of players 3.7% of players 66.6% 0% most earned rarest
Almost everyone has
66.6%Equivalent Exchange — Complete your first synthesis
45.2%Spreading Shadows — Reach Phase 2
36.7%The First Bloom of Sin — Fail to guard your sister
Rarest badges of honor
3.7%Gluttony — Hidden achievement
4.1%Lonely Cell — Hidden achievement
4.2%Sister Priestess of Astlint — Clear the Normal Ending

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-09-26. Steam prices vary by region — always confirm your local price on Steam.

$15.19−20% right nowcurrent · sampled 2026-09-26 21:12 UTC
$18.99base price
$15.19lowest since tracking began2026-09-26
US15.19 USD−20%
EU14.79 EUR−20%
UK12.71 GBP−20%
Australia22.36 AUD−20%
Canada19.83 CAD−20%
Japan1,848 JPY−20%
Brazil46.39 BRL−20%
China63.20 CNY−20%

Regional prices at last sample, in local currency — Steam sets each region's price independently.

Brazil≈$9.0 China Japan Canada US Australia UK EU≈$17

Cheapest → most expensive, converted to USD at ECB reference rates (2026-09-25). Relative comparison only.

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Apr 29, 2026
Huge update with lots of new content! (v1.3+)

This DLC update adds a total of 16 updated scenes, including expanded endings, additional Stage 3 sister content, a new sweet scene with the brother, extra Villa events, and the full implementation of

Feb 17, 2026
Elena's Story is now available to wishlist!

Hello, everyone! We’re delighted to reveal our next upcoming release: Elena's Story ！ https://store.steampowered.com/app/3694000/Elenas_Story_The_Vaalbara_Chronicle/ Play as Elena in this isometric ha

Dec 12, 2025
The game has sold more than 40000 copies! (Update v1.1.0)

Update v1.1.0 Changelog: Fixed an issue where three mini scenes in the villa could not be played correctly. Fixed a bug where Kana might appear in an incorrect location. Fixed the elite monsters in th

Dec 07, 2025
Update v1.0.9

\ Added a confirmation prompt in the Reminiscence Room. We apologize for the delay; it was previously difficult to add large amounts of text due to translation-related challenges. \ Fixed bugs where H

Dec 03, 2025
Update v1.0.8

Version 1.0.8 Changelog: Fixed a bug where the villa would be empty at noon. Fixed a bug in the Prince battle where armor resurrection was effective for all party members. Fixed a bug where the firear

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-25.

GenresAdventure, RPG
Player tagsHentai · Sexual Content · 2D · Fantasy · Pixel Graphics · Crafting · Medieval · Cute · JRPG · Nudity · Combat · Turn-Based Combat (Steam store community voting)
FeaturesSingle-player · Steam Achievements · DualShock Controller Support · DualShock Controller Support · DualSense Controller Support · DualSense Controller Support · Partial Controller Support · Steam Cloud
LanguagesSimplified Chinese, English, Japanese * , Korean, Traditional Chinese *
Achievements16
Official sitehttps://saikeystudios.com
Minimum system requirements (PC)

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