Tomasz Hanusiak, creator of Blefuj
Published: 2026-07-10 · Updated: 2026-07-20
This guide describes rules and mechanics actually available in the Blefuj game.
Blefuj is a bluffing-and-association game played on one phone, no download, no sign-up. There are three modes: the classic group Impostor, plus Duo and Mind Leak for two players. This page explains each of them from scratch, so one person reading it is enough to get everyone playing.
Impostor, the group mode (3–10 players)
The goal: civilians try to identify the impostor, while the impostor tries to survive the vote without knowing the secret word. Everyone except the impostor sees the same word, so every proof of “I know the word” is also a risk of handing it to the bluffer.
- Set the player count, impostor count and a word category.
- The phone goes around: each player privately reveals their role and closes the screen.
- In turns, everyone says one association with the word.
- You discuss and vote on who the impostor is.
A mini-round: category Animals, the word “parrot”. The clues come in: “colourful”, “it talks”, “on a shoulder”. The impostor tries “in a cage”, it fits many animals, but the group senses the dodge and starts probing. Those moments are exactly the point.
Best for groups that enjoy debate and playful accusations, from the family table to a house party.
Duo, same word or different? (2 players)
The goal: work out whether you both got the same word. Each of you sees your word privately, sometimes they're identical, sometimes similar but different (say, two desserts, or two kinds of transport).
- Each of you privately checks your word.
- You trade associations, without saying the word outright.
- You guess: same word or different?
It differs from Impostor in that nobody is “against” anyone, you're both solving the same puzzle. Example: one of you has “pancakes”, the other “waffles”. The clues “sweet” and “with fruit” fit both, only “crispy” raises a doubt.
A quick, light mode, good as a warm-up, on a break or while travelling.
Mind Leak, bluff and deduction (2 players)
The goal: the Secret holder hides their secret while the Detective tries to crack it. The Secret holder plays through 5 short scenarios, answering aloud as if the secret were true, without ever saying it outright. At the end the Detective picks the real secret from 3 options.
- The app randomly picks who knows the secret.
- The Secret holder reads the secret privately and hides the screen.
- Over 5 scenarios they answer aloud; the Detective can ask follow-ups.
- The Detective picks the secret from 3 options and you check the result.
It differs from the other modes in being a role-play game rather than an association game: you don't drop single words, you act out reactions. An example scenario: “Someone suggests a spontaneous weekend trip. How do you react?”, the answer has to sound natural while quietly fitting the hidden secret.
The modes at a glance
| Criterion | Impostor | Duo | Mind Leak |
|---|---|---|---|
| Players | 3–10 | 2 | 2 |
| Round length | 3–6 min | 2–3 min | 5–8 min |
| Bluffing level | high | low | very high |
| Deduction level | high | medium | high |
| Difficulty | medium | low | medium |
| Best for | parties, gatherings | warm-ups, travel | dates, a night for two |
Which mode should you pick?
- A quick game for two (e.g. waiting for your order): Duo, a round takes 2–3 minutes and needs little focus.
- A date or a night in for two: Mind Leak, longer rounds, more conversation and laughs from acting out scenarios.
- A group of 3–4: Impostor with one impostor and an easy category, intimate, but with full deduction.
- A bigger party (6–10 people): Impostor; with 8+ players consider two impostors and a timer.
- First time playing: start with Impostor with the impostor hint enabled, or with Duo, the easiest entry points.
- A seasoned crew: Impostor with no hints and harder categories; for two, Mind Leak with harder packs.