Cold Case Games: Box, Subscription or Browser?
A cold case game hands you a closed file and asks you to solve what the police didn't. There's no game master and no one playing a character, just documents, photos and interviews, and the slow pleasure of noticing what doesn't add up. The format comes in three quite different shapes, and the right one depends mostly on how and where you want to play.
We make a browser-based game in this genre, so we have a stake in the answer. We've tried to set out the trade-offs fairly, and the reviews we quote are other people's, linked below.
- A one-off box is the best fit for a single evening with friends around a table.
- A subscription suits people who want a story to stretch over months and don't mind the cost.
- A browser game suits long-distance play, trying the format cheaply, or playing often.
- Writing quality varies widely within every format, so read a review of the specific case.
What is a cold case game?
It's a co-operative mystery played from a case file. You read through evidence, form a theory and check it against the game's answer. It differs from a murder mystery party, where guests act out scripted roles and the fun is in the performance. A cold case game is closer to a long puzzle: nobody performs, and several people can work the same file, or you can do it alone.
Three formats compared
| One-off box | Subscription | Browser | |
|---|---|---|---|
| Example | Unsolved Case Files, ThinkFun Cold Case | Hunt A Killer | Murder Mystery For 2 |
| What you get | One case, printed | A story told through a series of boxes | A library of digital cases |
| Time | Roughly 1–6 hours in one go, depending on the title | Six episodes spread across months | 15–50 minutes per case |
| Players | Small group round a table | Small group round a table | One or two, on one device or two |
| Replay | Essentially once, though some can be reset for a friend | Once | Once per solution, though some cases have variant killers |
| Long distance | Awkward | Awkward | Designed for it |
| Feel | Handling real paper | The anticipation of the next delivery | Instant, with less tactile charm |
One-off boxes: a complete case for one evening
Unsolved Case Files gives each case its own box with three objectives to solve in order, and you check your answers on the series' website. Meeple Mountain lists it for 1 to 4 players at 14+, and its reviewer finished one title in a little under two hours, while another is listed at two to six hours.
ThinkFun's Cold Case series also pairs printed evidence with a website: you answer four questions through drop-down menus, and the site tells you whether you're right. Room Escape Artist's reviewers recommended 1 to 3 players and put it at about one to two hours. It sold for about $15 at launch in 2021.
Boxes are the most natural fit for a table of friends. The main downside is that you can only really play each one once, although the reviewer notes Unsolved Case Files can be reset for someone else.
Subscriptions: a story that takes months
Hunt A Killer is the best-known subscription. A season is told across six boxes called episodes, and you narrow down the suspects as they arrive, using means, motive and opportunity. Listings we found put it at around $30 a month, though prices vary and have changed over the years, so check the current site. It also sells complete box sets and shorter standalone cases if you'd rather not subscribe.
The appeal is ritual. A monthly delivery gives a couple or a group a recurring event, and props feel more special than a PDF. The risk is cost and momentum: a story that lasts six months has to hold everyone's interest, and a group that misses two months may struggle to pick it back up.
Browser games: no box, no postage
This is the format we build, in Murder Mystery For 2. There's nothing to ship, a case takes 15 to 50 minutes, and two people can each hold different evidence on their own devices, even from different cities. You lose the feel of paper in your hands, and a case file on a screen will never have the same presence as a folder on a table. You gain the ability to start right now. The daily case and four others are free, so you can find out whether you like the format before spending anything.
Murder Mystery For 2 is a free browser-based two-player detective game with asymmetric evidence, live co-op and built-in voice chat. The daily case rotates every 24 hours.
Try a free cold case →How to choose one that's actually good
Format matters less than writing, and writing varies a lot. Meeple Mountain's reviewer called one Unsolved Case Files title an outright failure with logic that doesn't hold up, while rating another in the same series above average and preferring ThinkFun's more grounded logic. Yet three reviewers of a ThinkFun case split too: one enjoyed it, one recommended it to true crime fans with reservations, and one couldn't recommend it, finding too little puzzling and gaps in the solution.
So review the individual case, not the brand, and look for these:
- A solution you can reason out. Good reviews say the answer felt earned rather than arbitrary.
- The ratio of reading to thinking. One reviewer spent about 75% of their time on interview transcripts. That's a pleasure for some people and a chore for others.
- Hints. Some games have none. If your group gets stuck easily, check before you buy.
- Content. "Cold case" usually means murder, and some titles are grim. Check the age rating, especially for family nights.
To get more from whichever you choose, try our method for solving a murder mystery: it's built for exactly this kind of case file.
Can you work on real cold cases?
Many people who search for this are curious about real investigations, so here's the short version. Games are fiction, and they have a satisfying answer in the envelope. Real cases don't, and they involve real families.
Still, there's one real program with an unexpected connection to games: decks of cards. In June 2024, Florida announced 5,000 decks of playing cards for its jails and prisons, each card showing an unsolved homicide or missing-person case, in the hope of prompting tips. NBC News reports that similar decks helped solve 20 cold cases in Connecticut and at least eight in South Carolina. Those decks are aimed at people who might actually know something. If you ever do have real information about a case, take it to the police rather than a forum.
Our recommendation
If you have a table and a free Saturday, buy a well-reviewed box. If you want an ongoing ritual and like props, try a subscription, starting with a standalone case to test the style. If you're apart, short on time or just curious, start in a browser. And if you'd like more ideas for a night in, see our guide to mystery games for date night.
Sources
Prices and details come from the linked reviews and listings, and may have changed.
- Meeple Mountain, review of Unsolved Case Files: Jamie Banks and Harmony Ashcroft
- Room Escape Artist, ThinkFun's Cold Case: A Story to Die For
- Hunt A Killer, How to Play
- NBC News, Florida officials to release cold case playing cards