Gunpei Yokoi
commonly abbreviated as Nintendo R&amp;D1, was Nintendo's oldest video game development team. It was known as before splitting in 1978. Its creation coincided with Nintendo's entry into the video game industry, and the original R&amp;D1 was headed by Gunpei Yokoi. The developer has created several notable Nintendo series such as "Metroid", "Mario Bros.", and "Donkey Kong".