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

In THE SEARCH FOR PLANET X, a tabletop board game from Foxtrot Games, you will take on the role of these astronomers, using observations and logical deductions to search for this distant planet. The game uses a companion app to randomly choose a location for Planet X and other objects, following predefined logic rules.

As the earth travels around the sun, you will interact with the app to perform various research actions. You'll note what you learn on your deduction sheet, and you'll be able to piece together all the available information to publish theories and score points.

THE SEARCH FOR PLANET X captures the thrill of discovery, the puzzly-nature of astronomical investigation, and the competition inherent in the scientific process.

What’s New

Version 2.0.0

Activate 4000+ new game codes
Change text for single-sector surveys
Minor interface improvements:
- Add two-step selection on Conferences screen
- Change style for non-functional buttons (History, Bot: Finished)
- Add language name to the start screen
Add Spanish (beta) translations
Switch to WKWebView (required by App Store)
Upgrade Ionic and Cordova libraries

Ratings and Reviews

5.0 out of 5
9 Ratings

9 Ratings

mommymemory ,

Easy to Use

This app is the tool you need to play the board game “The Search For Planet X.” It is easy to use, and makes the game shine!

App Privacy

The developer, Foxtrot Games LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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