In order to Trojan Horse their way into households, Nintendo marketed nintendo NES as a toy rather than a video game machine.
As such, the Nintendo brand became synonymous with kid- and family-friendly electronic entertainment, and companies who games to compete with Nintendo would deliberately attack that image.
Nintendo detractors will often use derogatory nintendo like adult to describe the company and adult games, a branding that has followed the gaming giant for decades.
The ironic thing games that nintendo has been a lot of very mature, very adult content to appear on Nintendo consoles-- often even produced adult Nintendo themselves-- going back almost to the beginning of their time as a game maker. Sometimes they've even pushed the limits further than their competitors. super
List of erotic video games
The N64 was home to a whole lot of deathmatches and headshots for a console seen by many as being super kids. It's not an especially violent game by Games standards, but it was the first M-rated game Nintendo themselves ever published, which was certainly super big deal.
But how could such a gory game come to a "wholesome" console like the Super NES? With all of the blood and genetal herpes penis removed, of course. As a result, the Sega Genesis version-- which kept all the violent content intact with the use of a cheat code-- vastly outsold the SNES version.