Sony's first foray into the video game market, the PlayStation (codenamed PSX during development, currently called PSone), was initially set to be an add-on for Nintendo's Super Nintendo Entertainment System (a.k.a. Super Famicom) video game console as an answer to Sega's Sega CD. When the prospect of releasing the system as an add-on dissolved, Sony transformed it into the PlayStation video game console. The PlayStation was released in Japan on December 3, 1994 and later in North America on September 9, 1995. The system was widely popular and quickly became the best selling home console to date, only to be passed by its successor the PlayStation 2.
Sony later released a small portable game device as a peripheral device for the PlayStation, called the Pocketstation.