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KYKS
A KYKS project · 2026

Intrus.

The traitor is in the next room.

The deduction game played for real, at home, with one phone each.

Intrus app icon: a purple visor with two lime eyes glancing to the right

Your home becomes the game board. An intruder is hiding among you, and nobody knows who. 4 to 13 players, one phone each: Bluetooth knows who is near whom. The intruder has to be within range of their target to strike, and witnesses are a risk. At the end, the full timeline replays everything, down to the exact second you got played.

One house

The host turns on the rooms in play, each with its own mission, and picks the rally point.

One traitor

The intruder eliminates within Bluetooth range, away from prying eyes, and blends into the group.

One vote

A reported body or an emergency meeting: everyone to the rally point to debate, accuse, vote.

Deduction game

Your living room is the game board.

No board, no cards. 4 to 13 players in the same place, one phone each: the host creates the game and announces the code, everyone joins from their own phone.

01 / 05
Intrus key visual — Your living room is the game board: a robot waves inside a home while others hide behind the furniture.
Your role

One role. One secret.

Crewmate or intruder: press the screen against you, nobody must see it. The intruder has tools: Bluetooth-range eliminations, blackouts, jamming, countdowns, plus a cooldown that leaves just enough time to build an alibi.

02 / 05
Intrus role screen — Intruder side: a red-eyed robot with cat ears, “Eliminate within Bluetooth range, away from prying eyes.”
Missions

A mission in every room.

The host maps their own home: living room, kitchen, garage, office… Fuse board, radio jingle, water pitcher, safe cracking: you have to be in the right room, usually alone, which means vulnerable.

03 / 05
Intrus missions screen — fuse board in the garage, radio in the living room, pitcher in the kitchen, safe in the office, and the radio mini-game.
Emergency meeting

Who is the intruder?

Report a body, or call an emergency meeting on a hunch. Everyone meets at the rally point: debate, accuse, vote, before the timer runs out.

04 / 05
Intrus voting screen — Marc rang the alarm on suspicion, six players including Sami eliminated, “Vote Julie” button.
Your robot

Your robot, your style.

Colours, accessories and 11 animated expressions. Earn sonars by playing and unlock new looks. The optional INTRUS+ adds its own cosmetics, 300 sonars every month and +25% XP and sonars per game.

05 / 05
Intrus customisation screen — three robots (party hat, crown, headphones) and a grid of accessories and expressions.
Stack

Under the hood.

  • Flutter
    iOS + Android, single codebase.
  • Bluetooth Low Energy
    A temporary token per game: who is near, never where.
  • Cloud Functions
    TypeScript, server-side game logic, in europe-west1.
  • Firestore
    Real-time rooms and games, hosted in Europe.
  • Firebase Auth
    Anonymous profile, Apple or Google to get it back elsewhere.
  • RevenueCat
    INTRUS+ and sonar packs.
Available on iPhone and Android

Status

Intrus is out on the App Store for iPhone and on Google Play for Android. INTRUS+ stays optional.

Learn more
Download

One phone each. One traitor among you.

On iPhone and Android, right now.

Download on theApp StoreGet it onGoogle Play

Design, code and product direction by Kylian Titren for KYKS.