The short version About Cosykiller
Specialists in Narrative
Crime Solving.
Cosykiller case files are narrative murder mysteries you solve in your own time and in your own way. We research the period, write the story, source the paper, commission the artistic details, print the documents, and pack the boxes ourselves, and post them from a small workshop in Grimsby.
Where we came from
We bring a lifetime
of Experience.
Cosykiller is part of RHG Events Ltd — a unique team that has spent the last eighteen years making murder-mystery games for parties, holidays, schools, team building, fundraisers, corporate events, marketing, brand outreach, stag and hen weekends.
Cosykiller is our unique long-form content, a way to explore the full extent of what's possible in narrative evidence based case file experiences.
- 15 Years writing mysteries
- 5 Cosykiller cases on the shelf
- 40+ Countries we've posted to
What Cosykiller is trying to be
The most immersive case file experience you can enjoy.
Every case we post aims to be the most tactile, most cross-referenceable murder mystery you can fit in a single box. Four principles we never compromise on.
-
The Story
Designed by a published crime writer, each of our stories creates a unique world with detailed characters which you can explore and enjoy. It’s a rich story, like an exploded book, allowing you to pursue your own narrative.
-
Research
We research the history for the time period to ensure, where possible the documents and ciphers are true to the period. We cross reference news from the period to ensure our own story fits properly in the period providing other details you can pursue in real life.
-
Evidence
Each case is packed with realistic evidence. Dried botanicals, coins, telegrams, spices, miniature statuettes, letters, military archive documents, pendants, postcards and more. What you receive depends on the story. Everything is designed to be immersive.
-
Cross Referenced
The story is long form. Determining means, motive and opportunity means finding all the cross referenced information. Check dates, names, locations… Solving is only possible if you follow the right lead. It’s like being a real detective.
Why Cosykiller
Tried the others?
Ready to take it to the next level?
Case-file games are a busy shelf. Here's what ours do best:
-
01
Long form mystery
Most case-file games run for 1-2 hours. Ours start at 2 hours and can run to six or eleven. Long enough to get to know the characters, and find yourself following false trails, dead ends, and to change your mind as you uncover more.
-
02
Eighteen years of murder writing
We've been writing mysteries since 2007 — first as Red Herring Games, now as Cosykiller too. We've even published a few books! Our games are properly plotted whodunits with motive, means, opportunities and alibis.
-
03
Immersive digital-free solves
Cosykiller is a tactile immersive mystery. There's no app or digital integration required. Everything you need is in the box. There's nothing to download, no account to sign into, no digital integration that will lapse at a later date.
Who "we" actually is
A small team in Grimsby
Five people with particular obsessions, a workshop full of weird paper stock, dogs and a kettle that never stops.
We reply to emails — usually within a day, sometimes two — at hello@cosykiller.com.