Developer's DescriptionBy Pool 2020Content Rated 6+...Content Rated 6+Russian pyramid, also known as Russian billiard (Russian: , russky bilyard) or pyramid billiards, is a cue sport that has several differences from Western pool, although game play is still dominated by attempts to pocket (pot) billiard balls. It is played in Russia and also in countries of the former Soviet Union. A variant with colored balls modeled on those of Western pool is called Russian pool. Another variant, kaisa, is popular in Finland.