Kakugo no Susume, Hokuto no Ken: Raoh Gaiden Ten no Haoh Recommendations
Both titles are set in a post-apocalyptic setting after the earth was destroyed by a devastating event. The main protagonist in both anime uses martial arts to kill anyone that stands in their way. They are also both action-packed anime with lots of blood and gore. The differences between the two is that Apocalypse Zero is more wacky and has mutants for enemies while Legends of the Dark King: A Fist of the North Star Story has humans for enemies and has a better plot. If you enjoy one, you should like the other as well.