I don't care that this anime looks like (kinda) the game, because the story itself is much deeper and more interesting. The fighting part yes - more like a game, but characters and the story are more fun. The main character minion has his own mystery and we will never know now what exactly he could do, because the season 2 stopped after first episode.
I had fun with season 1 a lot. I never watched anime like this one. From 1 side it was funny and entertaining, from another side it was bloody and for adults only. The picture quality is great and I am surprised and sad that 1 more interesting story stopped and I can only guess what could happen next...