Grey or bust
The original PlayStation, launched in Japan on December 3, 1994 was grey -- inspired by the "workstation" computers of the era, according to gaming history expert Hiroyuki Maeda.
"The heads of Sony's US division would have preferred black, which they felt was more elegant, but the Japanese side categorically refused," Maeda told AFP.
They eventually relented, however. Apart from colourful limited edition versions, the PlayStation 2, 3 and 4 were black. The PlayStation 5, released in 2020, is white.
Joystick juggling
When Sony built the first PlayStation, it was inexperienced in making consoles, so "the creation of the controller was one of the biggest challenges", Maeda said.
"It's said they made more than 200 prototypes," he said.
Sony's CEO at the time, Norio Ohga -- an experienced pilot -- pushed for a more sculpted design for the controller, which with its signature triangle, circle, cross and square buttons, has changed little over the years.
In Japan, a circle is a sign of approval, and so for years, it was the controller button for "OK", with the cross button meaning cancel. The feature was inverted on PlayStation models sold in the West.
But Sony, conscious of the US market's importance, abandoned this Japanese peculiarity in its most recent console, the PlayStation 5.
Game library
PlayStation owes much of its success to its roster of games.
Sony's choice to use CDs instead of cartridges reduced manufacturing costs and production times, encouraging more game makers to create titles for its consoles.
"Ridge Racer" brought the 3D racing genre out of arcades and showed off the console's technical abilities, while early stealth game "Metal Gear Solid" bridged the gap between games and cinema.
"Final Fantasy VII" -- the first 3D instalment in the cult series, and the first not made for Nintendo consoles -- also introduced Japanese role-playing games to many Western players.
Other titles with a place in video game history are survival-horror classic "Resident Evil" and the global media franchise "Tomb Raider".
Store success
The PlayStation 2 is the top-selling console in the history of video games, with more than 160 million units sold.
One reason for its success is that it can also play DVDs -- allowing customers to kill two birds with one stone.
The limited supply of the PS2 and its huge demand led to fights when it was launched, including at the Virgin Megastore on the Champs-Elysées in Paris.
War machine?
The same year, the machine was reportedly placed on a list of sensitive items by the Japanese government because of its advanced graphics processing capabilities, raising fears of potential military use.
