feb 21, 1986 - The Legend of Zelda
The Legend of Zelda which was released on Feb 21, 1986 by Nintendo and designed by Shigeru Miyamoto and Takashi Tezuka. To date it is the fifth-best-selling Nintendo game selling 6,510,000. This game was one of the first open world game where you can explore the entire world.
Added to timeline:
Evolution of video games
It's evolution... but for games