While Nintendo's head of Research and Development 
Gunpei Yokoi was busy overseeing the roll-out of the 
Game & Watch silver and gold series, he still found time to create a follow-up to his very successful 
Ten Billion puzzle: the Nintendo 
Crossover (クロスオーバー
). 
Unlike the 
Ten Billion, which was sold in large numbers worldwide, only a small quantity of 
Crossover puzzles was produced, making it one of the more rare and sought-after Nintendo items from the toys and games era.
|  | 
| Nintendo Crossover (1981) | 
The 
Crossover was advertised using the phrase「偏光スクリーン」, which means 'Polarized Light Screen'. The official English sub-title was 'Polarized Light Puzzle'. Why this is, we will get to in a minute.
Crossover was released in 1981, in three color variants: green, red or purple. It cost the same as the 
Ten Billion puzzle: ¥1,000. 
|  | 
| Television commercial for the Nintendo Crossover |