Which Expansion

Mysterium expansions

Base game: 3–7 players42 minLibellud2 expansions checked
  1. #1 overall

    Mysterium: Secrets & Lies

    Buy this first

    BGG rates it 7.82 from 2,155 ratings. It has the same extra cards as Hidden Signs plus story cards. Thin evidence: no direct reviews compare the two.

    Needs: Just the base game

    Adds: 8 new suspects, locations and objects, 42 more vision cards and story cards that replace objects so the ghost tells how the victim died.

    Fixes: BGG forum posters say the base game's only weak point is limited card variety.

    Expansion3–7 playersAbout the same rules loadFine for any groupPrice: $20–$40
    DetailsReference:View on BoardGameGeekBuy:Asmodee StoreLibellud
  2. #2 overall

    Mysterium: Hidden Signs

    Worth it

    BGG rates it 7.75 from 3,307 ratings. Posters say it only adds variety with no rules changes, so it is safe from game one. Secrets & Lies has the same extra cards plus story cards.

    Needs: Just the base game

    Adds: 8 new characters, 8 locations and 8 objects (16 cards of each type) and 42 more vision cards for the ghost, with no rules changes.

    Fixes: BGG forum posters say the base game's only weak point is limited card variety.

    Expansion3–7 playersAbout the same rules loadFine for any group
    DetailsReference:View on BoardGameGeekBuy:AmazonLibellud

Need the base game?

Reference:View on BoardGameGeekBuy:LibelludAsmodee Store

Check before you buy

  • There is an original edition (2–7 players) and a 2025 Refresh (3–7 players). BGG posters report the expansion cards may not mix between them, so match the expansion to your base box by its player count.

Stuck between two?

Mysterium expansions: quick answers

Which Mysterium expansion should I buy first?

Mysterium: Secrets & Lies. BGG rates it 7.82 from 2,155 ratings (base game 7.19). It carries the same extra card count as Hidden Signs plus story cards, and posters say you can add the new cards first and the story cards later. Thin evidence: no direct reviews compare the two.

Is Mysterium: Secrets & Lies worth it?

Our verdict: buy this first. It adds: 8 new suspects, locations and objects, 42 more vision cards and story cards ("motive for the crime") that replace object cards so the ghost must tell how the victim died.

Mysterium: Secrets & Lies or Mysterium: Hidden Signs: which first?

We’d buy Mysterium: Secrets & Lies first. See the side-by-side comparison for what each adds and needs.

Other games’ expansion guides

Same publisher

Rankings are our editorial picks, built from the reviews linked on each expansion page. Last checked 2026-10-15.