So the funny thing about the Atari 5200 is that, for all intent and purposes, it is a redesigned Atari 8-bit computer, with frustratingly incompatible software. The Atari 8-bit line of computers is basically Atari's most popular gaming product of all time (even more popular than the 2600) but it's popularity was mainly confined to Europe. In America, we mainly remember Atari as the early gaming company, while in Europe, Atari was Commodore's primary competition and a major player until the 90's. Commodore had the Commodore 64, Atari had the Atari 8-bit. Commodore had the Amiga, Atari had the Atari ST.
Anywho, the funny thing is that, with this in mind, the 5200 controller has 17 buttons (plus 2 redundant buttons), and an analog, non-self centering joystick. What did the Atari 8-bit have?
Keep in mind they were essentially playing the same games. When games would come over from the Atari 8-bit to the 5200, they'd often fuck the controls up as hard as possible to make use of the number pad and useless analog stick.
What a terrible system and controller.