In Hawkins, Indiana, the Mind Flayer has created an army of possessed people to invade Earth. Some of you are already under its control...

At the start of Stranger Things: Attack of the Mind Flayer, each players takes a character tile representing someone from the Stranger Things Netflix series. You will also receive a card that tells you whether you are a Sane hero or Possessed by the Mind Flayer.

A game plays out over a series of turns and pits two teams against each other: Sane versus Possessed. As a Sane character, you must resist the Mind Flayer's attacks to win the game. As a Possessed character, you try to convert all Sane characters to Possessed or knock them out before the end of the game. On your turn, draw a card and give it to another player to help them, remove them, or make them change teams.