Dirty Harry is a 1990 video game based on the Dirty Harry film franchise starring Clint Eastwood. Though the game is sometimes incorrectly referred to as Dirty Harry: The War Against Drugs, nowhere on the box or in the game does it state that subtitle.

Double Dragon (ダブルドラゴン, Daburu Doragon?) is a 1987 beat 'em up developed by Technōs Japan and distributed in North America and Europe by Taito Corporation. The game is a spiritual and technological successor to Technos' earlier beat 'em up, Nekketsu Kōha Kunio-kun (released outside of Japan by Taito as Renegade), but introduced several additions such as two-player cooperative gameplay and the ability to arm oneself with an enemy's weapon after disarming them. Double Dragon is considered to be one of the first successful examples of the genre, resulting in the creation of two arcade sequels and several spinoffs, as well as inspiring other companies in creating their own beat 'em ups. Home versions of the game were released for the Nintendo Entertainment System, Sega Master System, Atari 2600, Atari 7800, Atari ST, Amiga, Amstrad CPC, Commodore 64, Game Boy, Genesis/Mega Drive and Atari Lynx, among other platforms during the series's height of popularity. A remake titled Double Dragon Advance was released for the Game Boy Advance in 2003. The NES version was re-released for the Wii's Virtual Console in North America on April 28, 2008 at a cost of 500 Wii Points. Nintendo also released the Game Boy version on the Nintendo 3DS Virtual Console in 2011. Another remake was released for the iOS mobile devices in 2011, which features brand new gameplay, sprites and animations, and music. A new Double Dragon title, Double Dragon Neon, was released in 2012 for Xbox Live Arcade and PlayStation Network, and in 2014 for Steam and is considered a reboot of the series.

Originally released for Japanese arcades in 1991, Double Dragon III: The Sacred Stones is the third game in the Double Dragon franchise. Developed by East Technology and published by Technos Japan Corp., Double Dragon III: The Sacred Stones has since been released on a wide variety of platforms, with numerous differences between ports. Typically regarded as one of the worst games in the franchise, Double Dragon III: The Sacred Stones is often criticized for its shop system, unnecessarily difficult bosses, and lowered graphical quality. Despite this, the NES version received mostly positive reviews, due to the more direct attention from Technōs Japan Corp.

Double Dribble, known in Japan as Exciting Basket (エキサイティング バスケット Ekisaitingu Basuketto?), was the second basketball arcade game developed and released in 1986 by Konami. It was the second basketball arcade game by Konami, following Super Basketball. Much of the game's popularity came from its animation sequences showing basketball players performing slam dunks, as well as The Star-Spangled Banner theme during attract mode, which was the first arcade game to feature the national anthem. These were uncommon in video games at the time of Double Dribble's release. While successful in the arcades, the game became and remained popular and remembered when it was ported to the Nintendo Entertainment System in 1987. Double Dribble was followed by a sequel titled Double Dribble: The Playoff Edition, which was released in 1994 for the Sega Genesis/Mega Drive. A remake titled Double Dribble Fastbreak was released for iOS in 2010, being based mostly on the NES version; however, the animation sequences were ripped from the arcade version.

Dr. Jekyll and Mr. Hyde (ジーキル博士の彷魔が刻 Jekyll Hakase no Hōma ga Toki?) is a 1988 side-scrolling action video game for the Nintendo Entertainment System loosely based on the novel Strange Case of Dr Jekyll and Mr Hyde.[2] Gameplay alternates between the characters of Dr. Jekyll and Mr. Hyde based on the player's ability to either avoid or cause damage.

Dr. Mario (ドクターマリオ, Dokutā Mario?) (Often stylized as D℞. Mario) is a 1990 Mario arcade-style action puzzle video game designed by Gunpei Yokoi and produced by Takahiro Harada. Nintendo developed and published the game for the Nintendo Entertainment System and Game Boy consoles. The game's soundtrack was composed by Hirokazu Tanaka. The game focuses on the player character Mario, who assumes the role of a doctor and is tasked with eradicating deadly viruses. In this falling block puzzle game, the player's objective is to destroy the viruses populating the on-screen playing field by using colored capsules that are dropped into the field. The player manipulates the capsules as they fall so that they are aligned with viruses of matching colors, which removes them from play. The player progresses through the game by eliminating all the viruses on the screen in each level. Dr. Mario received positive reception, appearing on several "Best Nintendo Games of All Time" lists. The game was either ported, remade, or has had a sequel on every Nintendo home console since the NES as well as most portable consoles, including a re-release in 2004 on the Game Boy Advance as part of the Classic NES Series. Modified versions of Dr. Mario were included as minigames in WarioWare, Inc.: Mega Microgames! and Brain Age 2: More Training in Minutes a Day!.

Dragon Ball (ドラゴンボール, Doragon Bōru) is a Japanese manga series written and illustrated by Akira Toriyama. It was originally serialized in Weekly Shōnen Jump from 1984 to 1995, with the 519 individual chapters published into 42 tankōbon volumes by Shueisha. Dragon Ball was initially inspired by the classical Chinese novel Journey to the West. The series follows the adventures of the protagonist, Goku, from his childhood through adulthood as he trains in martial arts and explores the world in search of the seven orbs known as the Dragon Balls, which summon a wish-granting dragon when gathered. Along his journey, Goku makes several friends and battles a wide variety of villains, many of whom also seek the Dragon Balls. The 42 tankōbon have been adapted into two anime series produced by Toei Animation: Dragon Ball and Dragon Ball Z, which together were broadcast in Japan from 1986 to 1996. Additionally, Toei has developed eighteen animated feature films and three television specials, as well as an anime sequel titled Dragon Ball GT, which takes place after the events of the manga. From 2009 to 2011, Toei broadcast a revised, faster-paced version of Dragon Ball Z under the title Dragon Ball Kai, in which most of the original version's footage not featured in the manga was removed. Several companies have developed various types of merchandising based on the series leading to a large media franchise that includes films, both animated and live-action, collectible trading card games, numerous action figures, along with several collections of soundtracks and a large number of video games. The manga series was licensed for an English-language release in North America by Viz Media, in the United Kingdom by Gollancz Manga, and Australia and New Zealand by Madman Entertainment. The entire anime series was licensed by Funimation Entertainment for an English-language release in the United States, although the series has not always been dubbed by the same studio. There have been many films of the franchise including the first live-action film adaptation being produced in 1989 in Taiwan. In 2002, 20th Century Fox acquired the rights to produce an American-made live-action film titled Dragonball Evolution that received a negative reception from critics and fans; the movie was released on April 10, 2009 in the United States. Since its release, Dragon Ball has become one of the most successful manga and anime series of all time. The manga's 42 volumes have sold over 156 million copies in Japan and more than 230 million copies worldwide, making it the second best-selling manga series in history. Reviewers have praised the art, characterization, and humor of the story. It is widely regarded as one of the greatest manga series ever made, with many manga artists such as Eiichiro Oda (One Piece), Masashi Kishimoto (Naruto), Tite Kubo (Bleach), Hiro Mashima (Rave Master, Fairy Tail) and Kentaro Yabuki (Black Cat) citing Dragon Ball as a source of inspiration for their own now popular works. The anime, particularly Dragon Ball Z, is also highly popular in various countries and was arguably one of the most influential in boosting the popularity of Japanese animation in Western culture.