Case No.
412
- City
- Paris, 8th arr.
- Status
- open
- Places on the map
- 100+
- Witnesses
- 9
- Evidence
- 23
- Time
- about 2 hours
- Final questions
- 7
Start with Anna’s letter. Don’t trust the husband.
[ Case 001 ]Paris · season 01
Every lieleaves a thread
Red Threads is online detective investigations. A city, witnesses, messages and documents, and you find the truth. Solo or as a team, even from different countries.
- [ 1–6 detectives ]
- [ about two hours ]
- [ English and Russian ]
What’s in a case
A case file arrives. Inside are a city, witnesses, messages and documents. Somewhere among them is the truth.
who was here? A city on the map
A hundred places: cafés, hotels, flats, a police station. Where to go is your call.
the neighbours saw them Witnesses
Question people and ask about the evidence you’ve found. Everyone hides something.
deleted messages Letters and messages
Photos, receipts, messages and documents collect in your case file.
prime suspect The verdict
Answer the case questions and name the culprit. Answers are checked and scored for the ranking.
Open cases
Every case is its own story in Paris. One purchase covers the whole team.
Detective · 16+
Room 412
hints included
Freetrial case
Play for free
Detective · 16+
A shadow on Rue Crémieux
Soon · December 2026
Details
Family drama · 12+
A letter with no return address
Soon · February 2027
DetailsHow it works
Easy to start, gripping to play — on a laptop or a phone, together or apart.
- Pick a caseopens right in your browser
- Invite friendsup to 6 people with one link
- Investigate60–120 minutes per case
- Name the culpritscore and a place in the ranking
As a couple, with friends, as a team
- Solojust you and the case, like a good detective novel at night1
- Couplesa date at home, the two of you against one lie2
- Long distanceeach at home, in your own country and language2–6
- Friendsa night in instead of the cinema: argue, suspect, guess3–6
- Familiescases without violence, from December8+
- Teamsa company event online or in the officeup to 20
Give a case
Give a particular case or leave the choice to them. The letter with the code arrives by email, for a holiday, a birthday or no reason at all.
Give as a giftQuestions
Yes. “Room 412” is our trial case, and it’s free in full: no cut chapters, no card needed. Leave your email and within a minute your whole team is in Paris — the map, the witnesses, the messages and the final debrief, just like in every case of ours. If you like it, the next cases are waiting on the same map.
One to six. Investigate alone, or invite up to five people and argue about the suspects together.
The trial case, Room 412, takes about 40 minutes; full cases take about two hours. You can stop and come back later: the team’s progress is saved.
No. The game opens in the browser on a laptop, tablet or phone.
Yes. Everyone opens the link at home, progress is shared, and each player picks a language. Call each other on any app.
Ask for a hint. They open one at a time as time passes, and never hand you the answer — they only point where to look.
By card, Apple Pay or Google Pay. Prices are in euros; your bank converts them to your currency. One purchase covers the whole team.
Yes, the case stays in your profile. The ranking counts your first attempt.
The thread is waiting. Pull it.
The first case, Room 412, is free. About 40 minutes, up to six detectives.
Open the case