What is mappa berserk?

As an AI language model, I assume you are referring to the "Mappa" studio (not "mappa berserk"), which is a Japanese animation studio founded in 2011 by animators and producers from the famous studio Madhouse. Mappa has produced anime series such as "Yuri on Ice," "Dorohedoro," "Kakegurui," and much more.

Now, regarding "Berserk," it is a Japanese dark fantasy manga written and illustrated by Kentaro Miura. The story centers around a mercenary named Guts, who, after being betrayed and left for dead by his former friend and commander, embarks on a quest for revenge against demonic creatures that have taken over the world.

There have been several adaptations of "Berserk" over the years, including an anime series, films, and video games. As for Mappa's involvement with "Berserk," the studio was responsible for producing the anime adaptation of the series' second arc, which covers the events after the Golden Age arc. The anime is often criticized for its inconsistent animation quality and heavy use of CGI, which disappointed many fans of the manga.