A werewolf is seen with "non-detailed" human breasts, when it turns back into a female human she is nude but covered strategically by shadows.

A human turning into a werewolf rips from their skin

several instances of zombies/monsters being set on fire and burning

use of machine guns and a flamethrower

several mentions of prior friends of main character being murdered

various monsters/ghouls and zombies. None of them very gory but they are visually disturbing

A woman is bitten by a giant bat in the neck, blood is shown on fang marks

A character is disintegrated non graphically

2 very human looking zombies munch on a leg

A supernatural and immortal dog character gets shot up and dismembered by explosions. He oozes some clear liquid but always seems to be in a good mood. No pain or discomfort shown.

Damn and crap

A character briefly smokes a giant magical hookah thing

The whole cartoon is done in the highly stylized designs of Mike Mignola which makes it seem less horrific. That said there are tons of monsters, zombies and other dead things all trying to kill each other (albeit in a fairly civil manner).