Investigate mysterious incidents at Star Haven High School, where real monsters are attempting to brainwash the student body. Gameplay Style:
, a hidden organization dedicated to battling the supernatural. The Central Mystery eng agent sirius dlc rj388166 rj01259073 new
Have you played the Agent Sirius series? Found other DLC codes like this? Share your experience in the comments below. Investigate mysterious incidents at Star Haven High School,
The latest expansion, often referred to as the or Full Content Update , significantly expands the narrative and gameplay: eng agent sirius dlc rj388166 rj01259073 new
A: The developer announced on Ci-en (December 2025) that Version 2.0 is the final update. "New" refers to the DLC’s release status as of early 2026.
⚠️ Always verify the DLC’s compatibility with your base game version. Check the DLsite product page for “動作確認” (operation confirmation) details.