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If you want Dark Stories, you got it.

Nitroplus Co., Ltd. (Nitro Plus before the 2008 rebranding), stylized as nitro+, is a Japanese game company specializing in Eroge and Visual Novels. Their works are almost invariably dark in tone, with an abundance of Eldritch Abominations, horror, rape, gore and violence.

Their first release was 2000's Phantom of Inferno, also was main writer Gen Urobuchi's first work with the company. Subsequent games such as 2003's Saya no Uta and 2008's Chaos;Head garnered enough acclaim for the studio's popularity to reach levels comparable to that of Key/Visual Arts, Type-Moon and 07th Expansion.

One of Nitro's most prolific creators is Gen Urobuchi, who has gone on to write Fate/Zero, Puella Magi Madoka Magica, and Psycho-Pass independent of the company. Vocalist Kanako Itou is another frequent collaborator, having performed the musical themes for many of their VNs and anime adaptations. On a sad note, their music producer Shingo Minamino was murdered tragically and brutally in the middle of a busy street.

They have their own record label, GEORIDE, which represents a repertoire of music artists that often performs vocal themes on their titles.

For some reason, the company responsible for so many dark and disturbing stories has a mascot in the pink-haired, baby-faced, be-headphoned Moe character Super Sonico. And for the branch that focused on producing Boys' Love Visual Novel called Nitro+CHiRAL have a mascot with long white-haired, always seen with his trusty bass, be-headphoned Bishōnen character called Naitou-kun.

In 2021, nitro+ announced that they are putting their R18 works (including Nitro+CHiRAL works) under a separate banner called Nitro Origin (formerly Nitro R18), while All-Ages stuff stays in the main brand, now renamed back into Nitro Plus.

Releases of Nitro+ (in chronological order):

  • Phantom of Inferno (2000)
    • Phantom INTEGRATION (2004)
    • Phantom -Phantom of Inferno- (2012) - All-ages remake of the original game for the Xbox 360, with updated art and voice actors from the anime adaptation. A PC port was released in 2013.
  • Vampirdzhija Vjedogonia (2001)
  • Kikokugai: The Cyber Slayer (2002)
    • Kikokugai -Reichin Rinrinshan- (2011) - Remake of the original game with voice acting and toned-down sexual content (Rated 15+)
  • "Hello, World." (2002)
  • Demonbane (2003)
  • Saya no Uta (2003) - one of Urobuchi's most famous— or infamous— works
  • Angelos Armas (2005)
  • Jingai Makyou (2005)
  • Hanachirasu (2005)
  • Sabbat Nabe - Nitro+ Amusement Disc (2006), a compilation disc which includes Dra+Koi, Nitrowars, and Kaigen Seito (a Role-Playing Game spin-off of Hanachirasu)
  • Gekkou no Carnevale - Carnevale de la Luce de la Luna (2007)
  • Zoku Satsuriku no Django (2007) - also known as Tre Donne Crudeli
  • Nitro+Royale - Heroines Duel (Comiket 2007) - a fighting game
  • Chaos;Head (2008) - First entry of the Science Adventure Series, their collaboration with 5pb.
  • Sumaga -STAR MINE GIRL- (2008)
    • Sumaga Special (2010) - a Sumaga fandisc
  • Full Metal Daemon Muramasa (2009)
    • Full Metal Daemon Muramasa Stories of Evil Thoughts (2010) - a fandisc
    • Project Vermillion (TBA) - a sequel to the main title.
  • Steins;Gate (2010) - Second entry of the Science Adventure Series, their collaboration with 5pb.
  • Axanael (2010)
  • Soni Comi - Communication with Sonico (2011)
    • Motto! SoniComi - More Communication with Sonico (2013) - PS3 port of SoniComi, featuring reworked graphics and more content.
  • Guilty Crown Lost Christmas (2012) - Prequel to Guilty Crown
  • Phenomeno - Chapter 1 (2012) - Adaptation of the novel of the same name
  • You and Me and Her or Totono (2013) - A romance game.
  • Tokyo Necro (2016) (official tumblr account)
    • Tokyo Necro Suicide Mission (2018-2022) - Licensed online game, developed and hosted by DMM. Service ended as of June 30th, 2022.
  • Minikui Mojika No Ko (2018) - Features artwork by Hamashima Shigeo.
  • Smile of Ars Notoria (2020) - An iOS and Android game made as part of the company's 20th-anniversary commemoration project.

Nitroplus also has a branch focused on producing Boys' Love Visual Novels: Nitro+ CHiRAL. Its works are listed below:

  • Togainu no Chi (2005)
    • Togainu no Chi: True Blood (2008) - A PS2 port of Togainu no Chi with updated art and toned down sexual content along with new characters. A PSP port was released in 2010.
  • Lamento - beyond the void (2006)
    • Love Love Lamento Gakuen (2009) - A drama CD featuring the characters in a high school setting.
    • convenience store LAMENTO (2012) - A drama CD featuring the main cast as employees in a said convenience store, the devils as customers, along with guest appearances of Togainu no Chi characters.
  • Chiral Mori - Chiral Amusement Disc (2008)
  • sweet pool (2008)
  • CHiRAL CAFÉ (2010) - A crossover drama CD between Togainu no Chi, Lamento - beyond the void, and sweet pool characters where they work at a cafe.
    • CHiRAL CAFÉ 2 (2016) - A sequel to CHiRAL CAFÉ, but with the addition of the cast from DRAMAtical Murder.
  • False Alkanet (2010) - A Mobile Visual Novel
  • World's end Nightmare (2010) - A Mobile Visual Novel that has 30 episodes.
  • DRAMAtical Murder (2012)
    • DRAMAtical Murder re:connect (2013) - A DRAMAtical Murder fandisc.
    • DRAMAtical Murder re:code (2014) - A Bleached Underpants PS Vita port of DRAMAtical Murder with a new route.
  • Osu-Boys!! ~Ikemen Ryoujoku ☆ Paradise~ (2014) - A comedic crossover visual novel featuring the protagonists of the studio's games. Released in April Fools' Day.
  • THE CHiRAL NIGHT rhythm carnival (2017) - A Rhythm Game based on the 10th anniversary THE CHiRAL NIGHT concert. Released in Comiket 92 in August 2017. This game can be bought at their online store.
  • Slow Damage (2021)
    • Slow Damage: Clean Dishes (2021) - A spin-off online game featuring a new pair of protagonists and some of the side characters of Slow Damage.

In addition, people from the company have worked on, or are credited in, other works:

Tropes Associated with Nitro Plus' Works:

  • 2D Visuals, 3D Effects: Most of the Background/Object images in their games are CG, made by CG Studio Polygon Bangcho/Nitroplus Arts. The artbooks usually show the wireframes/rough models of said backgrounds.
  • Age-Gap Romance: Most of the Chiral titles usually includes one romanceable hero who is significantly older than the Protagonist (Motomi in Togainu no Chi, Bardo in Lamento, Mink in DRAMAtical Murder, Taku and Madarame in Slow Damage)
  • Animal Motifs: Cats and Dogs in the CHiRAL titles.
  • April Fools' Day: They usually celebrate this every year. Highlights include them quitting the whole industry altogether to become farmers in 2008.
  • Associated Composer: ZIZZ Studio is the default composing group for their games. Kanako Itou is this for their vocal tracks, up until the late-2010s.
  • Cyberpunk : To date, they have made many works in this genre. Highlights includes "Hello, World", Kikokugai: The Cyber Slayer, Psycho-Pass, and DRAMAtical Murder. Their 2016 title Tokyo Necro continues this tradition, which is basically Blade Runner WITH ZOMBIES!
  • Deconstruction: The bread and butter of their body of work. For lighter shades, they tend to go for plain Darker and Edgier.
  • Demoted to Extra: Super Sonico enjoyed breakout success, earning herself figures, games, comics, and even an extended cast compared to her solo days as a concert mascot. Naitou-kun on the other hand? Quietly receded to the background, with his main appearances being limited to concert duty. As a company mascot, he's been reduced to one of five, the other four being Series Mascots from CHiRAL's library (Akira, Konoe, Youji, and Aoba) that have much more promotion and merchandise.
  • Development Hell :
    • Most of the official English localizations of their games. It's not the translation that takes a long time —— but rather, optimizing the games to run on modern machines that takes a long time.
    • Dogra Q, a dystopian fantasy work set to be written by Demonbane's writer. Announced in 2008, but has no updates since 2010.
  • Doing It for the Art:
    • Nitro Plus is really open to the western market (their CEO even visited Anime Conventions in the west for market research), Zoku Satsuriku no Django was even developed with the western market in mind, not to mention that their CEO once expressed an intent to adapt Saya no Uta into, of all things, a Hollywood Production. However, most official localizations of their titles are plagued with Development Hell that sometimes are in the same level as Valve.
    • However, the reasoning for this is actually that at least most of the older games are Remade for the Export. For example, the original version of Hanachirasu runs in their old engine used until 2008, while the localized version was ported to their N2System engine. Porting was done from scratch by the programmers of the original game, and it took a long time to do.
    • Soni Comi was no slouch either, while the localization didn't took a long time, the Steam version uses graphics and HD assets from the PS3 version, along with bonuses from that port. This version also fixed compatibility problems with newer Windows versions that were present at the original version.
    • The Chiral titles haven't been considered for official localizations to this day, but they let fans translate them. To this day all of their main titles (sans Slow Damage) have been translated. However, In 2018, JAST has announced the localization of sweet pool along with the rest of N+C's titles.
    • They also opened an international version for their own online store.
    • This aversion to No Export for You becomes especially impressive now that Full Metal Daemon Muramasa is getting localized, a novel whose difficulty to translate is considered to be in the same league as the infamous Kajiri Kamui Kagura with it's complex use of the Japanese language.
  • DVD Commentary: Completing an 100% Completion on their titles grants you to read the "Liner Notes" —- commentaries and production notes from people who worked on the titles.
  • Fanwork Ban: You can sell fanworks of their works, as long as it does not violate these rulesnote . They will outright sue anyone who breaks the rules out of copyright issue. Fans can ask them for permissions should they want to sell more than 200 items/go over the profit of 100,000 yen as mentioned abovenote 
  • Goroawase Number:
    • 2106, which is spelled 'Nitro', appeared in SoniAni and DRAMAtical Murder (as 2106 CR-L, with CR-L as 'CHiRAL'). Played for Laughs in Chiral's 2014 April Fools' Day game where the year 2106 is the slated release year for the full version of the game.
    • The company even regards February 16 (2.16) as "Nitro Day".
  • Keep Circulating the Tapes: The Chiral April Fools games (such as Osu Boys) were taken offline, but unofficial downloads still exist.
  • Magical Girl: Sumaga and Puella Magi Madoka Magica have main heroines that are these.
  • Mascot:
    • Super Sonico for Nitro+ and Naitou-kun for Nitro+CHiRAL, although they aren't exactly 'company mascots'note . The truest mascots they do have are the widely less promoted Nitro-kun (a cubic robot) and Chiral-kun (a star-shaped robot).
    • Super Pochaco, Super Taruco and Ouka also qualify as this, although they are less popular.
    • Nitro+CHiRAL gained the mascots Good Night, Inu, Fairy, Kisekiuo, and Brain Hatter after the 10th anniversary celebration of The CHiRAL NIGHT. They also use the protagonists of their most popular games as additional Series Mascots.
  • Mascot Fighter:
  • Meaningful Name: The current engine used for their games is called N2System. N2 is the chemical symbol of Nitrogen.
    • Super Sonico is written as 'すーぱーそに子', which could meant 'Super Sound Girl' or 'Supersonic' (as in supersonic sound). Naitou-kun, on the other hand, is derived from 'Night', although could be a derivation of 'Nitro' ('Nai' is spelled as 'Ni' in English pronunciation). The main draw from their names can be found in the fact that they were both mascots for their respective branch's concerts, NITRO SUPER SONIC (Sonico) and THE CHiRAL NIGHT (Naitou).
  • Lighter and Softer :
  • Vanity Plate: They used one in Saya no Uta (CG Sequence of a weapon-like thing opening to reveal their logo) and Lamento - beyond the void (a shot of characters' tail followed by N+C logo)

Alternative Title(s): Nitroplus CHIRAL