Planetarium: Primordial

Adds two optional modules that change how planets form and how planetary temperature matters during play. Epochs starts the system empty and lets players create protoplanets that later evolve into planets; an altered Acceleration trigger causes a Late Heavy Bombardment that redistributes matter across the board and can spawn comets that act as wild matter. Frost Line inserts a movable boundary between inner and outer orbits and replaces the standard evolution cards with ones that track heat and cold markers; an optional variable-star rule lets players spend points to shift the star’s brightness and move the Frost Line.

Players: 2–4 best 4
Playing time: 45–60 min
Age: 10+
Complexity: 2.8 / 5