The Fallout community has been abuzz with speculation and excitement over "Agent Sirius." Forums and social media platforms are filled with theories about the plot, potential companions, and the impact this DLC will have on the game's overall narrative.
As more details emerge about this intriguing DLC, one thing is clear: "Agent Sirius" is set to become a memorable chapter in the "Fallout 4" saga, offering both new and veteran players a reason to return to the Commonwealth.
Whether you're here for the lore, the gameplay, or simply to experience another piece of the Fallout universe, "Agent Sirius" promises to deliver. So gear up, and get ready to face whatever this new DLC has in store for you.
🚨 NEW ENG RELEASE: AGENT SIRIUS 🚨
The English patch is finally here for the Agent Sirius series!
📂 Codes: RJ388166 & RJ01259073 🌐 Status: English Translated 🗓️ Topic: New DLC / Patch Release
Get it while it's hot! #AgentSirius #Translation #RJ388166 #RJ01259073 #HGames eng agent sirius dlc rj388166 rj01259073 new
The DLC (Downloadable Content) adds new missions, scenes, routes, or voice lines to the base game. The tag “new” suggests a recently released update—potentially within the last few months—that either adds the English patch or expands the story.
The ENG Agent Sirius DLC (RJ388166) is more than just a translation—it is a definitive edition of the game. For the hundreds of players who tried to play RJ01259073 with machine translation and gave up frustrated, this DLC is the key to finally enjoying one of the best spy-themed visual novels of the last five years.
If you own the base game, buy the DLC without hesitation. If you are new, buy both together. The "new" epilogue and professional localization finally make Agent Sirius accessible to the entire English-speaking doujin community.
Rating: Highly Recommended (with a coupon).
Have you played the new English DLC for Agent Sirius? Share your thoughts on the epilogue ending below (no spoilers, please). For more localization news on RJ-coded games, subscribe to our newsletter.
Agent Sirius is a mystery RPG developed by Kumada Gaon that follows the story of Beni Akesuzu, a high school detective who is also a secret agent for an organization specializing in the supernatural. Game Overview The Fallout community has been abuzz with speculation
The game is set at Star Haven High School, where mysterious incidents targeting female students have begun to unfold. Players take on the role of Beni, alongside her friend Nadeshiko, to investigate these events. Genre: Mystery RPG / Investigation.
Core Mechanics: Exploring the campus, gathering clues, solving puzzles, and battling supernatural foes hiding in the shadows.
Story: Beni works for "Bancho," a secret organization dedicated to fighting monsters that aim to brainwash the school's population. DLC & Updates
The specific identifiers RJ388166 and RJ01259073 refer to product codes on platforms like DLsite, typically indicating localized or expanded content versions.
Recent Activity: A significant update (Build 22740810) was recorded on SteamDB as recently as April 11, 2026.
System Requirements: The game requires Windows 7/8/8.1/10, 4 GB of RAM, and approximately 1 GB of available storage space. The DLC (Downloadable Content) adds new missions, scenes,
Availability: You can find the game and its related content on platforms like the Steam Store or specialized retailers like the Saikey Store. Agent Sirius Patches and Updates - SteamDB
Fallout 4 DLC Update: Engaging with Agent Sirius
In the vast and immersive world of "Fallout 4," the latest DLC (Downloadable Content) has brought with it a flurry of excitement and intrigue. Dubbed "Agent Sirius," this expansion pack promises to dive deeper into the lore of the Commonwealth, introducing players to a character that might just change the course of their journey.
Before diving into the DLC, let’s set the stage. Agent Sirius (the base game) is a spy-themed interactive fiction/RPG developed by a prominent Japanese doujin circle. You play as a covert operative entangled in a web of seduction, betrayal, and counter-intelligence. The game is known for:
The base game (RJ01259073) was a hit on DLsite, but the lack of English support left many players relying on MTL (machine translation) patches.
These rj numbers are DLsite product IDs. DLsite is a major Japanese digital marketplace for games, manga, and voice dramas.
Based on typical DLC patterns for story-driven games on DLsite, here is what you can likely expect from rj01259073: