Nitroplus is a Japanese visual novel developer best known for their darker, grittier takes on the genre. They've put out a bunch of visual novels over the years, including eroge titles, and their stuff tends to lean into heavy themes—think reanimation, murder, that kind of thing. They also run Nitro+Chiral as a dedicated branch for BL visual novels, which has built up its own solid fanbase.
One of their biggest claims to fame is the collaboration with TYPE-MOON on Fate/zero, which started as a light novel series and blew up from there. Fans often point to this partnership as a turning point for how seriously the industry took their work.
Content compiled by AnimeList.moe from publicly available sources.
