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The Search for Planet X

(2 reviews) Write a Review

Since 2016, astronomers have been searching for a distant planet to explain the unique orbits of observable objects in the solar system. 

Do you have what it takes to find Planet X?

Download the official GM Kit, which allows you to play The Search for Planet X without the companion app.

Download Printable Player Sheets
Black and White (Printer Friendly)
Full Color


  • Players take on the role of astronomers, participating in this real scientific investigation.
  • Use the free companion app to survey for objects and take other actions.
  • Use the app results and the logic rules to find objects, publish theories, and deduce where Planet X must be!
  • Created for 1-4 astronomers, ages 13+, to discover in 60-75 min. 

Contents Summary:

  • 1 Solar System Board
  • 1 Earth board
  • 1 Wooden Sun Disc
  • 48 Theory Tokens (12 per player)
  • 4 Player Screens
  • 8 Target tokens (2 per player)
  • 4 Player Miniatures
  • 1 Pad of Note Sheets (double-sided)
  • 4 Expert Mode Cards
  • 1 Rules book

1 to 4
Time to Play:
60-75 minutes
Game Designer:
Ben Rosset
Game Designer:
Matthew O'Malley
Game Artist:
Michael Pedro
Game Artist:
James Masino

2 Reviews Hide Reviews Show Reviews

  • 4
    Solid Game

    Posted by Search for Planet X on Jun 14th 2022

    This logic deduction game does a good job of incorporating mechanics with a solid theme. If you are interested in astronomy its a good game to add to your collection.

  • 5
    Great deduction game!

    Posted by Evilmanta on Jul 26th 2021

    This game is a fantastic deduction game. It's great that people of different skill levles can play with each other at the same time by adjusting your individual difficulty level at the start of the game.

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