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About Agent Sirius
Agent Sirius follows Beni Akesuzu, head of the detective club at Star Haven High, as she investigates a series of mysterious incidents targeting girls. With her secret role in the supernatural‑fighting organisation Bancho, Beni and partner Nadeshiko must explore the campus, gather clues, and confront hidden monsters. Player choices shape relationships and lead to multiple endings, while unique battle challenges test Beni’s gadgets and resolve. The game blends adventure investigation with RPG‑style encounters in a single‑player experience.
01 / THE GUIDE
Investigation and Exploration
The school grounds serve as the primary area for players to roam, interact with a wide cast of characters, and collect evidence about the eerie incidents. Exploration is driven by the need to uncover clues that advance the central mystery.
Each location offers distinct visual cues and dialogue options that can reveal new leads, encouraging thorough examination of the environment before progressing.
- Take note of repeated visual details; they often hint at hidden clues.
- Compare dialogue from different characters to spot contradictions.
02 / THE GUIDE
Finding the Culprit
After gathering evidence, players must analyze it to identify suspects among teachers and students, each with unique backgrounds and possible motives. The analysis phase links clues to characters, narrowing the list of potential perpetrators.
Suspect motives are revealed through conversation and discovered items, allowing players to form theories before confronting the identified individual.
- Organize clues by character to see patterns more clearly.
- Re‑visit characters after new evidence appears for fresh insights.
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Unique Battle Challenges
When evidence forces hidden entities into the light, players engage in distinct challenges against sinister foes. These encounters test Beni’s special skills and gadgets, differing from standard dialogue scenes.
Success in these battles depends on using the provided tools effectively, as each encounter presents its own challenge.
- Observe enemy behavior before attacking to choose the best gadget.
- Keep gadgets in reserve for challenging encounters.
04 / THE GUIDE
Choices Matter
Player decisions influence the story’s direction, affecting relationships—especially between Beni and Nadeshiko—and leading to different endings. Choices can alter how characters respond and how events unfold.
Consequences are reflected in later scenes, making early decisions important for the overall outcome.
- Consider long‑term relationship impact when making dialogue choices.
- Track choices in a notebook to anticipate future branching.
05 / THE GUIDE
Platform and Feature Support
Agent Sirius is available on Windows and includes Steam Achievements, Steam Cloud, and Family Sharing. These features integrate with the Steam ecosystem, allowing progress to be saved online and the game to be shared through Family Sharing.
The game is single‑player, focusing on a solitary investigative experience without multiplayer components.
- Enable Steam Cloud to keep your progress synced across devices.
- Check the Achievements list for optional goals that encourage thorough exploration.
COMMUNITY
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