History of Nintendo
In 1972, the first commercially available video game console, the Magnavox Odyssey, had a light gun accessory, the Shooting Gallery. This was the first involvement of Nintendo in video games. According to Martin Picard in the "International Journal of Computer Game Research": "in 1971, Nintendo had -- even before the marketing of the first home console in the United States -- an alliance with the American pioneer Magnavox to develop and produce optoelectronic guns for the Odyssey (released in 1972), since it was similar to what Nintendo was able to offer in the Japanese toy market in 1970s".
East vs. West: Berlin 1948
"Berlin 1948" was the first video game to incorporate an audio cassette in the actual gameplay. Since the speech synthesizers of the time were not very sophisticated, and recorded sound took up too much disk space, the game designers took an inventive approach. At different times during the game (such as the Intro and other cinematic sequences) you are asked to play the appropriate audio clip on a home cassette deck.