Impostor mode is La Mubi’s social-deduction game. Instead of competing in teams, all players sit together as individuals, and the game secretly assigns one or more of them the role of Impostor — they never see the movie. Everyone else views the full movie card and must give clues that prove their knowledge, while the Impostor has to listen carefully and bluff convincingly enough to survive the vote. The tension comes from trust: a confident clue might belong to a real fan or a skilled faker, and a hesitant one might expose an Impostor — or an extremely cautious non-Impostor. The goal for the majority is to identify and eliminate every Impostor through debate and voting before they are outnumbered.Documentation Index
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How to Play
Lobby Setup
Select Impostor from the main lobby. Add at least 3 individual players (Impostor mode does not use teams). Give every player a unique name. Configure two options before starting:
- Impostor Count — defaults to 1. The maximum allowed is
floor((players.length - 1) / 2), which ensures non-impostors always outnumber impostors at the start of the game. The lobby auto-caps this value (with a minimum of 1) if players are removed after it was set. - Debate Timer — choose 30, 60, or 90 seconds; defaults to 60. Increase it if your group likes longer arguments; decrease it to keep rounds snappy.
Role Reveal
The game enters the revealing phase. Each player must view their role screen privately — pass the device around the table one player at a time.
- Impostors see the message: “You are the IMPOSTOR!” followed by the reminder “Fake it — you don’t know the movie.” They receive no movie information whatsoever.
- Non-impostors see the full movie card: poster, title, release year, rating, synopsis, director, and genres.
Word Round
The game moves to the word_wait phase. Players take turns in order, each saying one word that relates to the movie. Non-impostors should choose words that are accurate but not so obvious they instantly give the answer away. Impostors must pick a plausible-sounding word with no knowledge of the film — generic enough to fit many movies, specific enough to avoid suspicion.Everyone listens closely. A word that feels slightly off, too safe, or strangely unrelated is often the first crack in an Impostor’s cover.
Debate
Once every player has given their word, the game enters the debate phase and the configurable debate timer starts. Players now speak freely — challenging each other’s word choices, defending their own, and building a case for who they think the Impostor is. The Impostor should participate actively, redirect suspicion, and avoid going quiet.When the timer expires, the group must move to a vote.
Voting
The game enters the voting phase. The host reviews the table’s consensus and taps the name of the player the group wants to eliminate. Elimination is immediate — the selected player is removed from the round.After elimination, the game checks the win condition. If it is not yet met, the surviving players continue with another word round, debate, and vote cycle until a winner is determined.
Win Conditions
| Side | Win condition |
|---|---|
| Non-impostors | All impostors have been eliminated through voting. |
| Impostors | After an elimination, the number of remaining impostors is greater than or equal to the number of remaining non-impostors. |
Impostor Count
The lobby defaults to 1 impostor. The maximum you can set is derived from the total number of players N using the formula:| Players (N) | Max impostors |
|---|---|
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 2 |
| 7 | 3 |
Debate Timer
The debate timer controls how long players have to argue their case in the debate phase before a vote must be called. Three options are available: 30, 60, or 90 seconds; it defaults to 60 seconds. There is no penalty for finishing discussion before the timer runs out — the host can call for a vote at any time — but the timer provides a natural forcing function that keeps rounds from dragging on indefinitely.ImpostorState Phases
Impostor mode moves through five distinct phases in order. Each phase maps to a specific screen and set of allowed actions.| Phase | Description |
|---|---|
revealing | Players view their roles one at a time. The device is passed around privately before the round begins. |
word_wait | Players take turns giving a single-word clue. The game advances through each player in sequence. |
debate | Open discussion with a running countdown. Players argue, accuse, and defend until the timer expires or the host calls a vote. |
voting | The host taps a player name to eliminate them. The win condition is evaluated immediately after. |
result | The outcome is revealed — who won, who the impostors were, and what the movie was. |