There is a lame book about that topic, "Made in Russia: Unsung Icons of Soviet Design". I wish it covered more products and had more technical and on-point descriptions. Instead it got essays by annoying anti-communist hipsters who for the most part don't seem to have the historical-technical understanding to properly assess the quality of things.
Couple things from the book:
Erudit – Similar to Scrabble, but designed around the Russian alphabet.
Elektronika - Imitation of Nintendo's Game & Watch.
Za Rulem (Behind the Wheel) - A mechanical racing game introduced in the 70s. The race track is simulated by a rotating disc with obstacles. According to the book, new versions are still made (the book is from 2011).
Krugozor - A legendary monthly magazine that came with thin vinyl disks with music from all around the world.