2020 · コアルール（プレイに必要な最小限）

UMBRA: A Solo Game of Final Frontiers

A solo map-drawing game about establishing a science-fiction colony on an unforgiving alien planet. Players generate natural formations, alien ruins, enemies, technologies, and other threats while managing starvation and defending the settlement. The game includes turn-based combat, colony-building rules, and optional challenges for a harder experience. Play requires a pencil, paper—preferably with a one-inch grid—and a standard deck of playing cards.

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