masakoii said:manga:
ares-idk if the art is to your liking but this is a completed series and it has more than 100+ chapters(i think) but the mc was REALLY OP right from the start and he didn't care who he had to kill
Ichi- not sure if this is to your taste as the mc is a female but, she is badass blind swordswoman who people underestimated bc she was a woman and was blind but big mistake bc she would cut through all of them and prove them wrong :-) 39chapters and completed
gamaran- this is another historic swordsman manga but the mc is a boy who is op af and keeps getting stronger and stronger. this manga is really easy to binge read as the story is really interesting and funny at times and it is 194 chapters completed. if you want a badass manga i recommend this one as it is one of my favorites.
Dendrobates- A badass assassin who kills anyone without mercy. the storyline deepens as the chapters go on. 58 chapters completed.
jackals- another assassin type of manga similar to dendrobates except more action and better art. 56 chapters completed
*there were many more but i forget which ones i also read that were good atm. maybe i will post more later if i remeber :-)
Anime:
chrome shelled regios: badass mc who was a legendary swordsman who was exiled. harem with lots of action but more on the fantasy side.
darker than black: (im sure you already know about this anime)
Zettai Karen Children: The Unlimited - Hyoubu Kyousuke- what more is there to say this is about a op almost god-like mc who will protect those who he values and destroy everything that is in his way.
gangsta: def swordman who is super badass (but he has to take pills so he cant feel pain) either way he is super badass and this anime was actually super interesting and i will probally rewatch this again. (the manga for this anime is good to)
Jormungand: okay this is a mercenary gun dealing type of anime where the mc is a little boy who is a soldier and kills many enemies with a gun and there is also a girl mc who controlls the deals but she is super smart and strategic. there are two seasons and they are both really good.
one outs: baseball type of anime the art is on the more older type (but the storyline makes it easy to watch) he messes with his opponents minds and keeps winning one game after another.
devil may cry- not very similar to the game but still has that badass mc who is the son of the devil and kills demons for a living, what more is there to say
bayonetta: bloody fate- okay this a movie and a female protag. but trust me she is badass af and her personality is a little crazy but i love it. there is many action scenes where she just dominates everything.
i watched many others but i cant think of them atm so maybe i might post more for the anime rec. too if i can recall anymore :-) hoped this helped