In the near future, demons with the ability to fuse with machinery and infest corpses have begun terrorizing mankind. Dubbed 'Amalgams', no one knows how they are created, or where their abilities originate from. As the random outbreaks continue, the general population begins to panic, demanding protection from these vicious beasts; enter XAT, a military unit created solely to counter the Amalgam threat. Despite being a highly skilled unit, however, they find themselves hard pressed to contain the threat, let alone subdue it. To compound matters further, a new type of Amalgam surfaces that proves even more devious than the rest - one made from the human, not machine. Yet all is not lost, two of these new Amalgams - the feisty Gerd and the mysterious Blue - actively oppose the others. With the odds stacked against them, will they be able to protect mankind while simultaneously being shunned by it?
Following a global war and climate change, 35% of Earth's land mass has sunk into the ocean. In this difficult time, countries rely not on armies but on private military corporations to provide security against constant terrorist attacks. One such company is Arqon Global Security, whose staff of mercenaries is tasked with protecting Daiva City on a pay-per-mission basis. Armed with motorcycles that transforms into weapon-wielding mecha, these "blademen" are none too popular with the people they protect - but they always get the job done!
In both animes there is a military type group of people with their own problems. Both groups ride motorcycle type vehicles with offensive capabilities and battle non-human enemies. There are lies, betrayals, and the worlds they know are not as they know them.
One might initially compare Blassreiter and Viper's Creed based on their usage of a special organization with shape changing motorcycles that work to destroy mindless automatons. And you would be correct to do so. However, there is also an underlying thread of secrecy and intrigue that runs through them as well.
After witnessing a rare summer snow with his friends, Kusaka Yuu begins to develop supernatural abilities. Years afterwards, he finds himself the target of powerful beings, and learns that his powers are due to the "ayakashi," parasitic organisms that grant special abilities in exchange for a portion of the host's life force. The conflict turns treacherous as Yuu’s friends’ lives also become threatened, and he learns the truth behind the loss of his dear friend, Izumi. Will Yuu free himself from the ayakashi, or will he succumb to the temptation of power?
Koshigaya and Komada are professors by day, but at night, they are Bio Hunters. Their mission? Hunt down people infected with the ellusive Demon Virus, and destroy it. Things become complicated when the two become entangled with the fate of Sayaka, a woman whose grandfather is a famous psychic. With powerful enemies on their trail, they must find Sayaka's lost relative to hear his prophecy, or die trying!
Blassreiter and Bio Hunter involve characters who struggle with their (literal) inner demon, while at the same time fighting with demons without to save humanity. If you enjoyed this in one, I think you will enjoy it in the other.
A devastating earthquake strikes Tokyo, leaving the city in ruins. Man's only hope is to use boomers, an artificial humanoid form. Everything seems perfect until some of the boomers go crazy and start killing people. The only hope of stopping them is the Knight Sabers, a group of 4 female heroes in form-fitting power suits, with which they can perform amazing feats of strength and agility.
Both Bubblegum and Blassreiter start out the same: rogue biological machines in a stacked city environment. From there, they veer into similar directions, enter environments completely different from where they began, and address themes you didn't necessarily expect them to address. While Bubblegum brings a cast of strong characters, Blassreiter takes you on a visually stunning CGI ride. Watch them together, and it'll fill in the gaps.
In a futuristic world almost barren of life, mankind is confined to mechanized domed cities where A.I.’s control all aspects of life. In this world, humans are no longer born, they are manufactured in a production line; and alongside them live androids known as autoreivs. Within one of these domed sanctuaries named Romdeau lives Re-l Mayer, one of a few citizens who aren’t entirely prevented from thinking. Her grandfather's prominent position and the affection of the scientist Daedalus have left her more free will than is normally allowed, but Re-l has started to question the sanctity of the city and the citizens' perfect way of life. With mysterious beings known as proxies causing havoc and a man named Vincent causing great influence on her life, Re-l must travel outside of the city to find the answers she seeks and discover the mystery behind "the awakening".
Ergo Proxy and Blassreiter involve human characters that also have a powerful alter ego inside them. Throughout the series, said characters struggle to control their inner demon, wrestling with their own humanity. If you enjoyed that plot in one, I think you will enjoy the other.