The search keyword targets the English localized expansion content for Agent Sirius , an indie Japanese role-playing game (JRPG) and mystery adventure developed by Lunarian and published globally by Saikey Studios. The tracking identifiers RJ388166 and RJ01259073 point directly to its specific catalog listings on digital distribution platforms (such as DLsite), where players track original versions, translation patches, and newly released downloadable content (DLC).
Agent Sirius established itself as a standout title by blending traditional RPG progression with tactical stealth elements. Players step into the role of a specialized operative tasked with infiltrating high-security facilities. The game's strength lies in its player agency, offering multiple paths to complete objectives.
The game centers on , an ordinary-looking high schooler who leads a complex double life. On campus, she serves as the president of Star Haven High School’s detective club. In secret, she operates as a top agent for Bancho , a covert organization specializing in suppressing supernatural phenomena.
An uneasy atmosphere has settled over the campus as girls become targets of eerie, urban-legend-style incidents. Real monsters are lurking in the shadows, plotting a sinister scheme to brainwash the entire student body Key Characters Beni Akesuzu (Agent Sirius)
: A rich choice between non-lethal ghost runs or aggressive, lethal takedowns.
typically refers to a secondary or updated listing (such as a DLC or English-localized version) on the same platform. Saikey Store
Below is a "deep dive" article exploring the evolution of the title, its expansion through DLC, and its place in the modern "Secret Agent RPG" genre.
If you are looking to purchase or verify your version, check out the official digital storefront entries hosted on the Saikey Studios Developer Profile or download it directly via the Agent Sirius Steam Storefront Entry.
True to the developer's niche, the visual expansion packs a wide array of specific thematic elements (including Group, Mind Control, and Futonari variations).