If you liked the Deadman Wonderland anime, the Anime-Planet community thinks you'd like:
Jin is an energetic young boy living in a shanty town and making ends meet by performing good deeds for money. However, when his mentor dies during a fight with a strange monster he finally learns the meaning of death. Having been taken in by a stripper named Akemi whom he once saved, Jin begins to live a quiet and normal life - though in reality he is anything but ordinary. With superhuman abilities and a group of mysterious men searching for him under the name of Zet, over the years Jin finds himself drawn into a world of creatures with dangerous powers called "Players". But what is Jin really, and with his vicious methods of defeating these threats, is he really a hero for justice or simply another dangerous monster?
These two animes have similar basic themes. Both have superhuman characters that fight a secret war mainly for the enjoyment of the rich. Survival is key. Though Deadman is showed in a prison, Zetman displays what happens when superhumans get loose. Great show. Tons of action, and gore.