Zetman, Devilman: Crybaby Recommendations
In both anime, the protagonist can transform into a superhuman monster and are trying to keep their humanity intact. The main protagonist in both anime battles various monsters that can disguise themselves as humans that threatens humanity. Both are action-packed anime with lots of blood and gore. They also have a similar dark and gritty atmosphere. If you like one, you will enjoy the other.
Essentially the same theme and to a certain extent the same conclusion. Both shows just had that similar atmosphere. I'd definitely recommend it if you liked Devilman: Crybaby.
Both have humans transform into Demons/Devils a bit of nudity and violence too.
Both oficial this animes talks about hope and pain and definitely they aren't happy or good for children, but If yuo want a good sad drama with a lot of gore, this seinen animes are yuo
Zetman is like an tribute to devilman, but but focused on superheroes perspective, and changing key aspects of devilman for others