Hellsing Ultimate, unlike the 13-part Hellsing series, follows the manga of the same name very closely. Alucard being the main protagonist and anti-hero/vampire. Hellsing Ultimate is a 10-part series of OVAs whereby Alucard turns Sera's into a vampire. The main focus of the plot being on an enemy neo-nazi group.

Berserk is a 25-part anime set in a dark fantasy/horror environment whereby the series focuses on the main character guts; a lone swordman who later meets up with a group of mercenaries called the band of the hawk. The leader of this band holds a strange necklace called a behelit that will only lead to evil.

After moving into the quiet town of Hinamizawa, Maebara Keiichi spends his days blissfully in school often playing games with his local friends. However, appearances can be deceiving. One fateful day, Keiichi stumbles upon news of a murder that had occurred in Hinamizawa. From this point on, horrific events unfold in front of Keiichi, as he soon learns his close friends may not be all that they seem.

Death Note is an anime series based around a manga of the same name whereby a human finds a death god's notebook. Any person's name written in this notebook will die. The main character who finds this noteboook is Light Yagami who faces off against an unfaced character named L who tries to challenge him.

Fullmetal Alchemist: Brotherhood is set in a fictional world where alchemy – the transmutation of raw materials into objects – is science, and the way of life. The series follows the Elric brothers, Edward and Alphonse, on their perilous journey in search of the legendary "Philosopher's Stone". They set forth hoping that the magical artifact can restore their bodies after a failed attempt to revive their dead mother cost Edward his left leg and right arm, while Alphonse's entire body was taken away leaving his soul affixed to a suit of armor.Source: Anime News Network

Edward Elric, a young, brilliant alchemist, has lost much in his twelve-year life: when he and his brother Alphonse try to resurrect their dead mother through the forbidden act of human transmutation, Edward loses his family as well as two of his limbs. With his supreme alchemy skills, Edward binds Alphonse's soul to a large suit of armor.

A year later, Edward, now promoted to the fullmetal alchemist of the state, embarks on a journey with his younger brother to obtain the Philosopher's Stone. The fabled mythical object is rumored to be capable of amplifying an alchemist's abilities by leaps and bounds, thus allowing them to override the fundamental law of alchemy: to gain something, an alchemist must sacrifice something of equal value. Edward hopes to draw into the military's resources to find the fabled stone with his power and restore his and Alphonse's bodies to normal. However, the Elric brothers soon discover that there is more to the legendary stone than meets the eye, as they are led to the epicenter of a far darker battle than they could have ever imagined.(Source: MyAnimeList)