The Search for Planet X

On the edge of our solar system, a dark planet may lurk. Since 2015, astronomers have been working to deduce its location. Can you be the first to find this distant planet?

In The Search for Planet X, players take on the role of these astronomers, competing to make this great discovery. Each game captures the thrill of discovery, the puzzly-nature of this astronomical investigation, and the tense competition often found in the scientific process.

  • Players: 2-4
  • Ages: 13+
  • Time: 60-75 Minutes

2019 PAX South Indie Showcase – Official Selection (link)
Stonemaier Design Day 2018 – #1 Rated Game (link)

— Coming to Kickstarter 2019! —

Prototype components shown


Each game you play, you’ll use a different map of the solar system divided into
18 sectors. The location of objects in these sectors, governed by predefined logic rules, are tracked by our companion app or by a moderator. 

Each round, players will visit observatories and perform actions. Here are some example actions a player might take:

  • Scan for comets in sectors 13-18. The app reveals: 1 Comet
  • Target sector 15. The app reveals: Asteroid Field
Example: There are always 4 asteroid fields, and they are always in pairs.

Finding Planet X is not easy; it appears as empty space in scans and targets. As the rounds progress, the players will start to know the locations of the various objects. They can start publishing theories, which is how they’ll score points. Players can also learn crucial information from peer reviews and conferences, and they hope to put everything together to locate Planet X. When a player is ready, they tell the app where they believe Planet X is located, as well as the objects in the two sectors adjacent to it on either side.

Once Planet X is found, players have one last opportunity to publish theories and locate Planet X to share in the discovery. The moderator or the app reveals the location of all the objects, and players count up their points for their correct theories and discovery. The player with the most points wins the game.

The Search for Planet X captures the thrill of discovery, the puzzly-nature of this astronomical investigation, and the tense competition of the scientific process.

— Coming to Kickstarter 2019! —