Fallen Priestess: My Sister's Demonic Bloodline

Fallen Priestess: My Sister's Demonic Bloodline

Released Nov 2025

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!

72% positive · 648 reviews
Not yet
Released, but still in active development
Medium confidence
Active Development
Not yet
Released, but still in active development
Medium confidence
Active Development

Where to buy

Steam $18.99
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Evaluation

Fallen Priestess: My Sister's Demonic Bloodline launched on November 21, 2025. Since launch, the developer has been actively engaged: a wave of bug fixes and feature patches shipped in the first two weeks, followed by a development status post on December 12, 2025 in which the developer noted 40,000 copies sold and confirmed that free DLC was planned for February–March 2026. That free DLC appears to have arrived with the major April 29, 2026 update (v1.3+), which added 16 new or updated scenes including expanded endings, new sister content, villa events, a full Inn system, and a new costume-lock feature. The game has received consistent, meaningful post-launch additions since its November 2025 release. The developer has not announced that development is complete or that no further content is planned, and the sustained update pace suggests ongoing engagement with the title.
Evidence
Major content update (v1.3+) ships 16 new/updated scenes, expanded endings, Stage 3 sister content, Villa events, full Inn system implementation, and a new costume-lock feature.
news post · Apr 29, 2026 source content shipped
high
Developer confirms 40,000 copies sold and announces free DLC planned for February–March 2026; development on a new game has also begun.
news post · Dec 12, 2025 source content planned
high

Media

Details

Developer
Publisher
Saikey Studios
Achievements
16
Platform
Windows
Controller
partial support
Steam Deck
Playable
Players
Single-player

About this game

Lloyd grew up never knowing his real parents, living with his sister Trina in the border town of Aslint. He hunts and works as an artificer, while Trina has just begun training as a priestess. Their quiet life shatters when Trina falls mysteriously ill. Lloyd soon learns that Trina carries demon blood, triggered by the presence of a sealed Demon Lord nearby. To save his sister from a worsening fate, Lloyd must find a way to defeat the Demon Lord—before she transforms into someone unrecognisable.

Travel the richly detailed world, full of diverse characters, each with their own stories and quests to discover. Craft items and upgrade your gear to grow stronger. Converse with the townsfolk to gather any information that could help Trina, whose condition worsens as the demon blood within her awakens. Venture beyond the town’s borders and gather rare ingredients, explore dungeons, battle monsters, and level up. But after a long day’s adventure, don’t forget to return and tend to Trina's growing thirst for mana.

Last evaluated Jun 14, 2026
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