What is the Atari logo font?

The pioneer of arcade games, home video game consoles, and home computers, Atari, uses custom-designed typeface very similar to SF Atarian System .

This is a free font and is available here:

 SF Atarian System 

The Atari logo, which resembles the Japanese mountain Fuji and also known as the “Fuji” logo, was designed by George Opperman. The logo, however resembles the mountain, was actually designed with the game “pong” in mind.