Product Details

The Cases Are Cold. Your Trail Is Hot.

Ever wanted to solve a murder? This murder mystery experience brushes up your sleuthing skills while immersing you in a complex world of puzzles, ciphers, suspects, and backstories - there’s even a few false leads to throw you off the trail. Each box is packed with vintage memorabilia, keepsakes...and intrigue.
  • For ages teen and up; work on your own or in a small detective team of players
  • Monthly subscription; 1 mystery takes 12 months (12 boxes) to complete
  • Internet is not required but hints are available from private Facebook groups and a secret website
  • Features vintage memorabilia, coherent storylines, replica items, and cool keepsakes
  • Each letter accompanying the box is personalized to the customer - makes it a great gift item!

Past Boxes from Cosykiller

Box 1
Box 1

The first box in our subscription is a diary which sets the scene for the entire story. You can start at any point in the year and you will always begin with the same box 1. Because our story follows you, rather than the other way around. Unless otherwise requested we will start you with Box 1 in our "Inheritance of Murder" story.

Box 2
Box 2

The second box of your subscription contains more information and clues, this time in the form of tickets, letters and newspaper clippings. You should always keep boxes to hand so you can compare information

Box 3
Box 3

Box three contains a batch of letters written back in 1934 to a friend of the missing girl, along with her sketches. Could these be the suspects in her murder case?

Box 4
Box 4

Month 4 furthers the story with telegrams, letters, theatre programme and most importantly, more government documents found by the heir hunters which could give more clues to the case.

Box 5
Box 5

This box contains more newspaper snippets, telegrams and a portrait of someone very familiar to you now. You also get some traditional Chai Tea in this box - which you can drink if you want! (it's not as old as the vintage letters might indicate.)

Box 6
Box 6

Another box comes around with some more letters to a puzzling friend of Marie's carefully collected and held by the family all these years. Included are portraits, newspapers and some strange notes, I wonder what they mean?

Box7
Box7

Another month roles around with some interesting government documents, newspapers and telegrams as well as information on an art gallery containing some pictures which may be by some of the suspects in the case.

Box 8
Box 8

Yet more letters arrive this time originally to her friend Georgina. Included within them are postcards, portraits and some confidential documents.

Box 9
Box 9

With the discovery of an antique bureau with a locked drawer more information arrives at your disposal, with codes, ciphers and pages from a diary containing a very familiar hand, but what could they all mean?

Box 10
Box 10

A bundle of exchanged love letters between close friends add more intrigue to the case as we find out things have turned for the worse. Included are more newspaper articles and government documents to help further the case.

Box 11
Box 11

The second to last box, the final pieces should now all be falling into place with scanned documents containing some very incriminating information if you know just where to look. Along with some final letters which might contain the secret you've been looking for.

Box 12
Box 12

The finale of our story "An inheritance of murder" this box wraps up all the loose ends and includes the answers to questions you might still have, as well as a few little gifts, and your inheritance for taking part in the story! Finally something in return for all your hard detective work.

Box 1 - The Curse of Humanrah - The second year
Box 1 - The Curse of Humanrah - The second year

When you reach the end of year 1 you are automatically enrolled into our 2nd case - the Curse of Humanrah - which explores a time of archeological excavation in Egypt in 1911-1913. Can you work out whether or not a Curse exists, and if not - WHO is the one responsible for the deaths?


Cosykiller appears in these collections…


CosyKiller: For the Armchair Sleuth.

by Cosykiller