To solve a murder mystery game, sort every piece of evidence first, build a timeline, then test each suspect for motive, means and opportunity until only one fits. Prove your answer with specific documents, and when you are stuck, use the publisher's graded hints one step at a time instead of opening the solution.
Proving document — In cold case games such as Unsolved Case Files, the piece of evidence you enter in the online answer key to show why your answer to an objective is right: the key checks the documents that prove your theory, not only the name of a suspect.
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Why a method helps
Most groups get stuck in a murder mystery game for the same reason: they pick a suspect in the first ten minutes and read every later document as proof. The fix is a method that delays the guess until the evidence is organized. The steps below work for cold case files, boxed investigation games and case-book games. If you are new to the formats, start with how murder mystery games work.
Step 1: Read the objective and the rules for checking
Before touching the evidence, find out exactly what the game wants from you, because each format checks your answer differently and that changes how you should work:
| Game | What you must deliver | How it is checked | When help appears |
|---|---|---|---|
| Unsolved Case Files | Three objectives, solved in order | Online answer key that asks for the documents proving each objective | The hint button appears only after a wrong answer |
| Cryptic Killers | The solution to the case | Answer submitted on the publisher’s website, with extra online evidence | Graded hints, from a nudge up to the full answer |
| Sherlock Holmes: Consulting Detective | Answers to a set of questions at the end of the case | Scored against Holmes’s own solution | No hints; every extra lead you visit lowers your score |
| Clue (Cluedo) | Suspect, room and weapon | Three cards sealed in an envelope, checked privately by the accuser | None; a wrong accusation ends your chance to win |
The objective tells you what to look for. The checking rule tells you how precise your answer must be: a game that asks for proving documents, like Unsolved Case Files, rewards a careful evidence log, while a game that scores the number of leads, like Consulting Detective, rewards thinking before you open the next location.
Also note what is off limits: sealed envelopes, answer booklets and any page marked “do not open until”. Put them in a separate box or hand them to one person.
Step 2: Sort everything before you guess
Know what you are sorting. Unsolved Case Files describes its cases as newspaper clippings, police documents, photos and other evidence, with the objective printed on a sticker inside the front cover and three sealed bonus envelopes, A, B and C, that you open only as you complete objectives 1, 2 and 3. Cryptic Killers lists newspaper articles, receipts, betting slips, police reports, train times, phone and text records, a map and witness statements, and adds evidence you can only reach online, such as a police officer’s email inbox. Paper and online evidence count equally: note the online items on a sheet so they end up in your piles too.
Spread the evidence out and sort it into piles. Two systems work well:
- By type: statements and interviews, official records, maps and floor plans, photos, letters and messages, puzzles.
- By person: one pile per suspect, plus a pile for the victim’s background and one for places.
Read every document once, quickly, without stopping on details. Cryptic Killers’ own advice is to read every piece of evidence in the case file, and it is good advice for any game: the key detail is often in the dullest document.
Mark anything with a time, a date, a place, a name or a number. These are the facts you will cross-check.
Step 3: Build a timeline
Draw a line on a sheet of paper or a whiteboard and place every timed event on it: arrivals, calls, purchases, sightings, messages. Use one color per suspect.
A timeline does three jobs:
- It shows gaps: a suspect with no account of an hour they claim was quiet.
- It shows contradictions: two people who say they were together, but whose phone records place them apart.
- It shows sequence: an object that appears in a photo before the time someone says they bought it.
Most cases turn on one of those three. Spend real time here.
Step 4: Test every suspect, not just your favorite
Make a grid with suspects in rows and three columns: motive, means and opportunity. Fill it from the evidence only, and write the source document next to each entry.
- Motive: a reason to want the crime, such as money, a secret or a rivalry.
- Means: the ability to do it, from access to a key to the knowledge required.
- Opportunity: the chance to be in the right place at the right time, which your timeline answers.
A suspect who fills all three columns is a candidate. A suspect missing opportunity, with a solid record to prove it, is out. Good games plant at least one suspect who looks perfect on motive and fails on opportunity. The grid catches that trap.
Step 5: Look for the cross-check
Strong solutions rest on two documents that only make sense together: a receipt and a statement, a map and a phone log, a photo and a letter. When you find a detail in one document, ask where else the case could confirm or contradict it. Games built around online answer keys, like Unsolved Case Files, reward this because they ask you to submit the proving documents, not just the culprit’s name.
In case-book games, the cross-check also saves points. Sherlock Holmes: Consulting Detective lowers your score for every extra location you visit, so a lead you can confirm from the newspaper or the map is a lead you do not need to chase.
Step 6: Use hints the right way
Getting stuck is part of the design, and most publishers give you a way out that does not spoil the ending.
- Ask for the smallest hint. Cryptic Killers’ hints and answers page goes from subtle hints to the full answer. Take one level at a time.
- Get help only when you have tried. Unsolved Case Files shows its hint button only after you submit a wrong answer, which forces a real attempt first.
- Name a reader. One player reads the hint alone and tells the group only what it points at, such as which pile to revisit.
- Set a rule in advance. For example, ask for a hint after 20 minutes without progress on the same objective.
Avoid walkthroughs, forums and video solutions while you play. One glance at a thread title can give away the culprit.
Playing as a group: split the roles
With three or four players, give each person a job so the table does not read the same document four times.
- The archivist keeps the piles in order and knows where every document is.
- The timekeeper owns the timeline and adds every new event to it.
- The skeptic argues against the leading theory and asks for the proving document.
- The hint keeper is the only one who reads hints and holds the sealed envelopes.
Rotate the roles between objectives or cases, so everyone gets a turn at building the theory.
Step 7: Commit, check and read the wrap-up
When one suspect survives the grid and you can point to the documents that prove it, submit your answer. If you are wrong, do not reopen everything: go back to the timeline, since most wrong answers come from a misplaced event. When you are right, read the wrap-up material carefully. It shows which clue you missed, which is the fastest way to get better at the next case.
Where to go next
If this method suits your group, a full cold case file is the natural next step: our comparison of the best cold case games ranks them on difficulty and playing time. If you prefer puzzles, components and a board, see the best murder mystery board games.
Key facts
- In Unsolved Case Files, the online answer key asks for the documents that prove your theory, and the hint button only appears after you enter a wrong answer.Unsolved Case Files, How to Play, 2026
- Cryptic Killers tells players to read every piece of evidence in the case file, and its website moves from subtle hints to the full answer so a case can always be finished.Cryptic Killers, How to Play, 2026
- In Sherlock Holmes: Consulting Detective, every extra location visited lowers your final score, which is then compared with Holmes's own score.Wikipedia, Sherlock Holmes: Consulting Detective (gamebook), 2026
- In Clue (Cluedo), the solution is three cards sealed in an envelope, one suspect, one room and one weapon, and a player who accuses checks them privately.Wikipedia, Cluedo, 2026
FAQ
What is the first step to solving a murder mystery game?
Read the objective, then sort every document before you form a theory. Group the evidence by type or by suspect, and note anything with a time, a place or a name. Theories built before the sorting tend to stick even when the evidence contradicts them.
How do you use hints without ruining the game?
Ask for the smallest hint available, and only on the step where you are stuck. Have one player read the hint and rephrase it for the group, so nobody sees more than needed. Never open the solution envelope or answer page until you have submitted a guess.
What if our group disagrees on the killer?
Ask each person to name the single document that proves their suspect. The theory backed by a specific piece of evidence usually wins. If two theories survive, look for the one detail each cannot explain, then check the timeline again.
Is it cheating to look things up online during a murder mystery game?
Searching for the game's own online evidence is part of play in many recent titles. Searching for walkthroughs or solutions spoils the case. Use only the publisher's website and hints, and close any page that names the culprit.