The Search for Planet X

The Search for Planet X is a logic-and-deduction board game that tasks you with using hard evidence to pinpoint a hidden planet at the edge of our solar system.

You play as competing astronomers, gathering observations through a free companion app and translating those results into airtight deductions. Each clue narrows the possibilities across the sector map, pushing you to publish theories for points while keeping your best insights behind your screen. Timing matters: spend too long double-checking and someone else may lock in Planet X first, but rush and you’ll waste turns chasing bad leads. With standard and expert modes, it scales from approachable puzzles to brain-burning investigations for 1–4 players, ages 13+, in 60–75 minutes. Available now at Boarding School Games—prove your theory first.

Key features

* Logic deduction board game with app-assisted observations and theory publishing
* 1–4 players, 60–75 minutes, ages 13+
* Standard and expert play modes included
* Components include Solar System board, Earth board, wooden Sun disc, and 4 player screens
* Includes theory tokens, target tokens, player miniatures, note sheets, and expert mode cards