Halcyon Casebooks is a browser based investigation game built around open ended mysteries. You step into a case, explore the scene, examine evidence, read statements, connect people and events, and decide for yourself what really happened.

There are no forced conclusions or step by step hints leading you to the answer. You investigate at your own pace, follow the details that matter to you, and build your own theory from the evidence you uncover.

Each casebook is designed to feel like a real investigation, where observation, reasoning, and attention to detail shape how you understand the case.

What’s included:

• Full access to the investigation casebook
• Crime scene exploration directly in your browser
• Evidence, statements, records, and investigative material to examine
• Tools to organize findings and connect clues
• A dedicated space to build and refine your theory
• No download or installation required

Open the case, follow the evidence, and decide what you believe happened.