On the edge of our solar system, a dark planet may lurk. Since 2014, astronomers have been working to to deduce its location. Can you be the first to find this ninth planet?

In The Search for Planet 9, 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: 10+
  • Time: 60 Minutes

Selection for 2019 PAX South Indie Showcase
Stonemaier Design Day 2018 – #1 Rated Game (9.16/10)

— Coming to Kickstarter 2019! —

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

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 moderator or the app reveals: 1 Comet
  • Target sector 15. The moderator or the app reveals: Asteroid Field
Example: There are always 4 asteroid fields, and they are always in pairs.

Finding Planet 9 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 9. When a player is ready, they tell the moderator or the app where they believe Planet 9 is located, as well as the objects in the two sectors adjacent to it on either side.

Once Planet 9 is found, players have one last opportunity to publish theories and locate Planet 9 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 9 captures the thrill of discovery, the puzzly-nature of this astronomical investigation, and the tense competition of the scientific process.

— Coming to Kickstarter 2019! —