Title: Teenage Mutant Ninja Turtles
Content:  regions, the franchise was renamed Teenage Mutant Hero Turtles for the violent connotations of the word "ninja". The first Turtles video game was released for the Nintendo Entertainment System (NES) in 1989; it was the first of several developed by the Japanese company Konami. It sold approximately four million copies, making it one of the bestselling NES games. As of 2015, the Turtles had featured in 23 video games.  In response to concerns that the series was drifting from its origins, Eastman and Laird published an editorial in the comic in 1989, writing: "We've allowed the wacky side to happen, and enjoy it very much. All the while, though, we've kept the originals very much ours." Eastman later said there was "some stuff that we wish we hadn’t said yes to", and Laird wrote of his dislike for the softer tone of the animated series. 
Title: Teenage Mutant Ninja Turtles
Content:  USD of Turtles toys were sold between 1988 and 1992, making them the third-bestselling toy figures ever at the time. The action figures were promoted with the first Turtles animated series, which premiered in 1987 and ran for almost a decade. In some European regions, the word "ninja" in the name was replaced with "hero" for its violent connotations. Three live-action films were released in the 1990s; the first film became the highest-grossing independent film up to that point. In 2009, the Turtles franchise was purchased by Nickelodeon, a subsidiary of Viacom. Viacom commissioned a new comic series, two new live-action films, and new animated series.
Title: Teenage Mutant Ninja Turtles (1987 TV series)
Content:  Hero Turtles to separate the 1987 television series from the other incarnations of the franchise. In 2009, a DVD of the first two seasons was released under the Ninja Turtles branding, thus bringing this version of the franchise into line with the later versions. Despite being in a PAL region, the series was always aired under the US “Ninja” title in Australia, unlike many other PAL region countries. The first season of the show premiered as a two-part (90 minutes each) prime-time miniseries on the Seven Network, after being promoted as coming soon in December 1989, as a new huge US show sweeping the world, and exclusive 
Title: Rise of the Teenage Mutant Ninja Turtles
Content:  On February 16, 2018, the first toys based on the series were presented during the New York City Toy Fair. The first Rise of the Teenage Mutant Ninja Turtles toys are expected to be released on October 1, 2018, but are starting to leak out on store shelves on September 20, 2018. In August 2018, the American fast-food chain Sonic Drive-In released a set of kids' meal toys based on the series, which were available in their Wacky Pack meals.
Title: Teenage Mutant Ninja Turtles (NES video game)
Content:  The game was released for the Family Computer (Famicom) in Japan a few months earlier than the American NES version under the title Geki Kame Ninja Den (激亀忍者伝). This was the first T.M.N.T. product released in the country, predating the Japanese dub of both the first film and the animated series. Subsequent T.M.N.T. video games released in Japan kept the franchise's original title. While graphics and gameplay are virtually identical to its NES counterpart, the Japanese localization changed the plot a bit by turning April O'Neil from an acquaintance of the Turtles into Splinter's daughter. The game was released as Teenage Mutant Hero Turtles in all European territories. The Australian version was released with the series' original title (Australia always used the "ninja" title), with the same cover art, but instead on a grey background.
Title: Teenage Mutant Ninja Turtles
Content:  The early 1990s saw the commercial peak of the franchise. The first Turtles film was released in 1990, featuring costumes designed by Jim Henson's Creature Shop. It was based more closely on the comic than the animated series, with a darker tone. It was the fourth-highest-grossing film of 1990 and the highest-grossing independent film at that point, earning more than $200 million USD worldwide. A sequel, The Secret of the Ooze, was released the following year; with a rushed production and a lighter tone, it received weaker reviews and was less successful at the box office. Teenage Mutant Ninja Turtles III (1993) was aimed at the Japanese market, the largest foreign market for US 
Title: Teenage Mutant Ninja Turtles in film
Content:  The fictional comic book team known as the Teenage Mutant Ninja Turtles created by Kevin Eastman and Peter Laird have appeared in six feature-length films since their debut. The first film, titled Teenage Mutant Ninja Turtles, was released in 1990 at the height of the franchise's popularity and was a commercial success. The success of the film garnered two direct sequels, Teenage Mutant Ninja Turtles II: The Secret of the Ooze in 1991 and Teenage Mutant Ninja Turtles III in 1993. During a revival of the franchise prompted by the successful 2003–2009 TV series, a separate computer-generated imagery (CGI) film titled TMNT was released in 2007. A fifth film by Paramount Pictures and Nickelodeon Movies was released on August 8, 2014, and served as a reboot to the original live-action films. A sequel, Teenage Mutant Ninja Turtles: Out of the Shadows, was released on June 3, 2016. The six films have grossed $1.2 billion worldwide. A seventh film, which will be a CGI reboot, is in development and is scheduled to be released on August 11, 2023.
Title: Teenage Mutant Ninja Turtles
Content:  The Turtles have appeared in six feature films. The first three are live-action features produced in the early 1990s: Teenage Mutant Ninja Turtles (1990), Teenage Mutant Ninja Turtles II: The Secret of the Ooze (1991), and Teenage Mutant Ninja Turtles III (1993). The Turtles were played by various actors in costumes featuring animatronic heads, initially produced by Jim Henson's Creature Shop. The fourth film, a CGI-animated film titled simply TMNT, was released in 2007. A reboot, also titled Teenage Mutant Ninja Turtles produced by Platinum Dunes, Nickelodeon Movies, and Paramount Pictures, directed by Jonathan Liebesman, and produced by Michael Bay, was released in 2014. A sequel titled Teenage Mutant Ninja Turtles: Out of the Shadows was released in 2016. A crossover film, called Batman vs. Teenage Mutant Ninja Turtles, was released in 2019.
Title: Teenage Mutant Ninja Turtles (NES video game)
Content:  Teenage Mutant Ninja Turtles, known as Geki Kame Ninja Den (激亀忍者伝) in Japan and Teenage Mutant Hero Turtles in Europe, is a 1989 side-scrolling action-platform game for the Nintendo Entertainment System released by Konami. In North America it was published under Konami's Ultra Games imprint in the US and the equivalent PALCOM brand in Europe and Australia. Alongside the arcade game (also developed by Konami), it was one of the first video games based on the 1987 Teenage Mutant Ninja Turtles animated series, being released after the show's second season. The game sold more than 4 million cartridges worldwide.
Title: Teenage Mutant Ninja Turtles (arcade game)
Content:  Teenage Mutant Ninja Turtles, released in Japan as TMNT: Super Kame Ninja (T.M.N.T. 〜スーパー亀忍者〜) and in Europe as Teenage Mutant Hero Turtles, is a 1989 beat 'em up arcade game released by Konami. It is based on the Teenage Mutant Ninja Turtles franchise, including the first animated series that began airing two years earlier. In the game, up to four players control the titular Ninja Turtles, fighting through various levels to defeat the turtles' enemies, including the Shredder, Krang and the Foot Clan. Released during a high point in popularity for the Ninja Turtles franchise, the arcade game was a worldwide hit, becoming the highest-grossing dedicated arcade game of 1990 in the United States and Konami's highest-grossing arcade game. Versions for various home systems soon followed, including the Nintendo Entertainment System. A sequel, Teenage Mutant Ninja Turtles: Turtles in Time, was released in 1991.

Question: when did the first ninja turtles come out?
Answer: 1984.
May 1984.