Violence consists of your character running-and-gunning while trying to avoid the various traps including electrified cables, laser beams and gun turrets. Some blood splashes are shown when you are hit but responses are minimal with both the human and zombie enemies having almost no physical reaction until the moment they are defeated and disappear. When your character is killed, you respawn at your last checkpoint.
When you fall foul of the traps, your character recoils with a small, blood splash effect and then collapses to respawn again.