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The Search for Planet X
At the edge of our solar system, a dark planet may lurk. In 2015, astronomers estimated a large distant planet could explain the unique orbits of dwarf planets and other objects. Since then, astronomers have been scanning the sky, hoping to find this planet.
What is The Search for Planet X
At the edge of our solar system, a dark planet may lurk. In 2015, astronomers estimated a large distant planet could explain the unique orbits of dwarf planets and other objects. Since then, astronomers have been scanning the sky, hoping to find this planet.
In The Search for Planet X, players take on the role of astronomers who use observations and logical deductions to search for this hypothetical planet. Each game, the companion app randomly selects an arrangement of objects and a location for Planet X following predefined logic rules.
Each round, as the earth travels around the sun, players use the app to perform scans and attend conferences. As they gain information about the location of the objects, they mark that information on their deduction sheets. As players learn the locations of the various objects, they can start publishing theories, which is how players score points.
As more and more objects are found, players narrow down the possible locations for Planet X. Once a player believes they know its location and the objects on either side of it, they use the app to conduct a search. The game ends when a player successfully locates Planet X, and all players have a final chance to score some additional points.
Game details
- Players
- 1–4
- Age
- +13
- Duration
- 75 min
- Difficulty
- Medium
- Type
- Board game
- Year
- 2020
- Mechanics
- Action Points · Deduction · End Game Bonuses
- Categories
- Deduction · Puzzle · Space Exploration
- Designer
- Ben Rosset · Matthew O'Malley
- Publisher
- Maldito Games · Foxtrot Games · Renegade Game Studios · 17wanzy (Yihu BG)
The Search for Planet X gallery
The Search for Planet X on Meeplay
See what the Meeplay community plays and thinks about The Search for Planet X, and add your own plays to the record.

What the community says about The Search for Planet X
Excelente juego de deducción, solo lo jugué en modo solitario
Deducción espacial con una lógica divertida , quizás demasiado individual para mi grupo
Modo Solo 9, setup rápido/batir enemigo/IA Sencilla por app/repetitivo/partidas pocas
An amazing game about researching and deduction; an amazing game to play solo or competing with 3 more players.
One of my favorite deduction games. A really bran-burning game. The app is easy to use and you can even play it remotely. I rather play it solo though, but there's no way to go wrong if you get it
Fantastic deduction game!
[url=https://misutmeeple.com/2022/07/resena-la-busqueda-del-planeta-x/]Reseña de La Búsqueda del Planeta X en Misut Meeple[/url]
Super interesante juego de DEDUCCIÓN estilo acertijo de Einstein. Tiene un cierto sabor a Alquimistas con duración más contenida (aunque no tan intensa, claro). Recomendable!! Impro-Reseña⇒ https://youtu.be/7p3w_u_fuJc
Everything about The Search for Planet X
How many players is The Search for Planet X for?
The Search for Planet X plays with 1–4 players.
How long does a game take?
A game takes about 75 minutes.
What age is it suitable for?
It is recommended from age 13.
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