aquarium underwater city represent board colony divide level deep game action take place end xxi century match last step round step main goal player build element city score pointsin turn player submarine spending uranium unit intercept character action character game commander allow supply submarine new crew allow entry inhabitant city engineer build element colony scientist alien provide technology card controller supply submarine colony oxygen investor provide money playersin addition aquarium mini expansion include base game special card character saboteur allow player hinder plan opponent interrupt flow oxygen certain colony board cause unexpected penalty

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