Sidereal Confluence: Proliferation

Players: 3–9 players
Play time: 120–160 min
BGG rating: 9.1

Expansion for Sidereal Confluence, just requires the base game but works with Bifurcation. Adds 42 advanced colonies, played during rounds 2-5, that make buying colonies valuable on every round. Adds cards and rules for real-time bidding. —description from the publisher

Prices

Best price for Sidereal Confluence: Proliferation: €19.00 at Boards of Madness. Compared across 1 store shipping to Portugal, last checked 1 October 2026.

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