Miura stated that the inspiration for the series' title was diffuse at the time of creation. He did not have information about the berserkers or the Berserker Armor (which first appeared in the 222nd chapter) planned out from the start. He chose the word, telling himself that "its mysterious aspect would stick well." Miura said that the title was connected to Guts' imagery, influenced by Mad Max's eponymous character, further elaborating: "In short, starting from a world with a dark hero who is burning for revenge, prompts you to imagine a rabid character. When, guided by his anger, he will pour out this rage on overpowered enemies, we must insist on his fanaticism if you want to stay consistent. That's why I thought "Berserk" would make a perfect title to represent my universe." According to Miura, the series' dark fantasy setting was inspired by the 1982 film Conan the Barbarian and the Elric of Melniboné series. Miura stated that he did not see dark fantasy as a genre in itself, but rather as an equivalent of general fantasy. He commented that outside of Japan the big works of fantasy, like The Lord of the Rings, contain dark elements, and in Japan, the fantasy genre was popularized by video games like Dragon Quest, which were aimed at children, and therefore, expurgated the dark elements, but since he received the influence from novels before that of those games, Miura "naturally turned to dark fantasy."
Berserk comes from Old Norse berserkr, which combines ber- ("bear") and serkr ("shirt"). According to Norse legend, berserkrs were warriors who wore bearskin coverings and worked themselves into such frenzies during combat that they became immune to the effects of steel and fire. Berserk was borrowed into English (first as a noun and later as an adjective) in the 19th century, when interest in Scandinavian myth and history was high. It was considered a slang term at first, but it has since gained broader acceptance.
Berserk frequently describes someone who is acting wild, crazy, or deranged. It is commonly used with forms of the verb go, as in go berserk or went berserk, meaning someone suddenly erupted into a frenzy of angry or violent behavior.
The berserk potion doubles damage, but takes away half of your current HP when used. It lasts for 80 ticks (a tick is the time it takes the Player to move one tile), or 120 ticks with the Sorceress' Hat.
In Detective Pikachu, the Berserk Gene is referenced several times as part of the drug known as R, which can momentarily make Pokémon more powerful, but also causes them to become berserk. Its effects derive from Mewtwo's cells and the Berserk Gene within them.
You should read the manga. The anime series just cover about 120 chapters out of 333 chapters of the original manga! and the anime is with less details. The manga is still ongoing, it is not finished and has been postponed for some years cause the writer was busy with another manga. I don't know if he starts writing berserk again or not! 2b1af7f3a8