Case File 093 · Inside Murder Book
Why Murder Book Cases Are Designed for 5–10-Minute Sessions
Why Murder Book's cases are built as complete 5–10-minute stories, and what that means for how you play.
Murder Book cases are designed for 5–10-minute sessions so that each one works as a complete story you can finish in a single sitting. Gungrounds' press materials describe the cases as "ideal for mobile or quick PC play." The format fits the game's subject: an interrogation is naturally compact, a single conversation examined closely. A short case lets you give your full attention to one suspect, notice the moment a story shifts and reach a conclusion before you are interrupted. Because cases branch, finishing one does not have to mean you have seen everything in it.
Key takeaways
- Each Murder Book case is designed to take roughly 5–10 minutes.
- The format is intended for mobile play and quick PC sessions.
- A single interrogation is a natural fit for a short, complete story.
- Short cases reward close attention rather than long play sessions.
- Branching endings give each case reasons to replay it.
How long is a Murder Book case?
According to the official Murder Book press sheet, cases are designed to take about 5–10 minutes each. That is the intended length of one case, not of the whole game. Actual time will vary from player to player: someone who reads every line carefully or explores different approaches may take longer.
Why design detective cases for short sessions?
A case you can finish is more satisfying
Long investigations are rewarding, but they are easy to abandon halfway. Coming back after a few days often means forgetting who said what, which is a real problem in a game where small details matter. A case built to be finished in one sitting keeps the whole story in your head while you solve it.
Interrogations are naturally compact
Murder Book's cases happen inside an interrogation. That structure keeps each case focused: one suspect, one account, one set of contradictions to work through. There is no need to pad a case with travel or item hunting to make it feel complete.
It fits how people play on mobile and PC
Murder Book is planned for PC (Steam) and mobile. Short cases work on both. On a phone, a case fits into a commute or a break. On PC, it can be a quick mystery at the end of the day or the start of a longer session working through several cases.
Short does not mean shallow
A short format puts more weight on each moment. In a 5–10-minute interrogation, a single line of dialogue or a small change in behaviour can decide the case. Players are rewarded for paying attention, not for the number of hours spent.
How do short cases stay replayable?
Development materials for Murder Book show branching case maps with multiple endings, achievements and a completion percentage. A case can end differently depending on what you noticed and how you pressed the suspect. That gives short cases a second life: finishing a case once gives you an answer, and replaying it shows you what you missed.
Who are short detective cases for?
Short, self-contained cases suit a wide range of players:
- Busy players who want a complete mystery without committing an evening.
- Mobile players who play in short breaks.
- Detective fans who enjoy close reading and deduction more than exploration.
- Newcomers to the genre who want a lower-commitment way in.
If that sounds like you, you may also like our guide to Best Detective Games Without Combat, which focuses on games where observation and reasoning matter more than reflexes.
What does a short case look like in practice?
In Murder Book, a case centres on an interrogation. You listen to the suspect, use the in-game casebook to recognise behaviours such as avoidance or fabrication, connect statements that do not fit together and choose how to press. The full loop is described in How Murder Book Turns Interrogation Into Gameplay.
When can you play Murder Book?
Murder Book is in development, with release currently planned for the end of Q2 2027 on PC (Steam) and mobile. For confirmed details as they are announced, see the Murder Book release and development FAQ.