The show's dark comedy revolves around the many ways in which Connor, the immortal main character, dies. Most episodes contain a severe amount of gore.
Most antagonists in the series are grotesque in nature, and try to kill the main character (usually successfully).
Connor is strangled by his own intestines in episode 3
In the pilot episode, Connor is killed repeatedly. Some deaths remain offscreen, though many are shown.
One episode has Conner being ripped to shreds by prehistoric aquatic creatures. However it's semi offscreen with his severed body parts floating around and the ocean turning red from his blood.
The beginning of "The Swordsman" shows the town of lost souls rebelling against the SCP foundation agents with them fighting, holding hostage, or killing them. Setting up the conflict for Conner in the episode. Compared to other montage murders in the show it's relatively tame but still violent nonetheless.