If you're looking for anime similar to Darker than Black: Gemini of the Meteor, you might like these titles.
Rokuro Okajima is a small-time salaryman who is carrying documents for his company, when the ship he's traveling on is attacked by pirates. Kidnapped, he discovers to his dismay that his employers' main concern is to ensure the documents don't get into the wrong hands, even if it means sending the carrier to the bottom of the sea. Now, with his former life ruined and his kidnappers seeming comparatively friendly, "Rock" decides to join their merry band of mercenaries, and sets out with a new career to the shadier corners of the South China Sea.
Fast paced action, darkness within humans and some badass main characters, these two shows have them. Both anime have speedy and fluent action sequences, a majority of characters with questionable morals and have a couple of very strong, badass characters (even a huge amount of them in Black Lagoon). If you saw and liked those aspects in DtB: RnG, you should most definitely check out the -much better- Black Lagoon.
well in both there are a lot of action, in both mercenaries and big companies DTB:RnG has a deeper story but the pace and story telling are similar so if you like one of these you need to try the other one
Both anime's involve the main antihero/plain evil protagonist kidnapping someone early in the series and then having them accompany missions as they grow closer. Both also have a strong focus on the underworld.
In times of olde, humans live in constant fear of demons known as yoma. These vicious creatures can take the appearance and memories of humans they have devoured, thus blending into society as they freely feast on human flesh. The key to stopping the yoma lies with the tolerated yet feared Claymores - women who are half-demon, half-human, and fully fated to become the demons that they hunt. Meanwhile, in a village, the young Raki has been banished; his only crime was losing his family to the yoma. Raki is drawn to a Claymore named Clare, and together their journey begins. While Clare fights the yoma plaguing the land, can Raki help her in her struggle to retain her humanity?
Both DtB: RnG and Claymore are dark action shows with fighters who used to be human. The fighters (contractors and claymores) have gained inhuman "superpowers" at some point in their lives, but not for free: they no longer have the same emotions as they used to, are to work for a certain organization and their powers come at the price of something every time they use it. If you liked the darkness and struggle for survival in DtB: RnG, check this one out!
The two animes are based in the change of rational thinking of the protagonists to emotions; which at the beggining it's supposed to be not possible.
The organisations are meant to be corrupted, so protagonists leave them with the consequences of being pursued by their previous coworkers.
In a nightmarish Earth, bugs (mushi) have begun to infect humans. Though not hurting their hosts initially, eventually the mushi devour the hosts' dreams, killing them in the process. Humans that are "lucky" enough to have their mushi killed ahead of time become emotionless and thoughtless zombies. In this uncertain time the Mushibune, infected humans who resist their persecution, are up against the Special Environment Preservation Agency, an organization hell-bent on destroying the mushi. Kakkou, SEPA's top agent, has been sent undercover to track down a high school student; but he didn't realize he'd meet and fall for the lovely Shiika instead...
Ten years have passed since the demise of the bubble economy, a time that polarized the world into two groups of people: the rich and the poor. In the present day, Saiga Tatsumi (a former war photographer) has been hired to investigate a secret club for the rich named the Roppongi Club, but he soon discovers secrets much darker than he’d ever imagined. With the help of a exploited goddess named Kagura, Saiga now possesses the power to kill by simply taking a photograph; but can he stay alive long enough to save her from her captors?
Similar concepts. Individuals gifted with supernatural abilities fighting each other. In both series the plot is centered around a special female character that the male lead is trying to lead to free from the bondage of a powerful organization.
Kijima Naito and Fei Zhui Lau are fugitives of a laboratory that cruelly researches the effects of the Sacred Seven crystals on humans. Parallel to what is happening in the Sacred Seven TV series, this is the story being told from their perspective.
Some years into the future, a strange, unexplainable natural disaster has broken off a piece of the Japanese mainland. Known as the Lost Ground, it is now inhabited by people with Alters -- machine-like extensions of their own will. In order to keep the peace on the Lost Ground, the HOLY organization uses its own Alter capabilists to police the region. In the midst of the chaos is a young man named Kazuma, whose life will soon change forever as he discovers his hidden abilities, and how to wield them.
Following a violent incident in his childhood, Alma Tandoji has been left an outcast at school and wants nothing more than to be quietly left alone. But one day Alma's solitary peace is shattered when a strange monster known as a Dark Stone attacks his hometown. Suddenly the boy finds himself thrust into the struggle between this strange creature and the ones fighting it: the Aiba Foundation and it's leader, the wealthy Ruri. Though reluctant to fight at first, amidst the battle, Alma learns that he possesses a power known as Sacred Seven that is linked to not only these mysterious creatures but also his forgotten past. Now, along with the help of Ruri and her bestpectacled butler Makoto, Alma must take up the mantle of protector to save the world from this new threat.
Several years after the incident in Amazawa town, Chinami Ebihara is now a member of an organization - founded by Sonomi Kujo - called OZ. Like its rival Foundation, OZ studies those with the special power known as 'Type-E' - the ability to affect electrical devices. However, while OZ wishes to help Type-E users gain control of their powers and be productive members of society, Foundation wishes to gain their power through force and use them for unknown purposes. Along with a fellow Type-E user named Maori, Chinami goes on missions to determine Foundation's motives and protect other Type-E users from their grip.
Gawl, Koji and Ryo may seem like ordinary exchange students, but in reality they're anything but normal. The trio has travelled into the past to stop dangerous genetic research from being completed – research that has terrible consequences in the future – and Gawl, a boy with the ability to morph into a powerful creature, may be their best hope in succeeding. Now, between trying to hide their secret from the nosy daughter of their landlord and attending classes at Oju Academy, the boys must race against the clock to complete their mission at any cost.