A child is strangled to death. Not very graphic but could disturb some viewers
Demodogs get inside a lab elevator full of people and attack and feast on them (the actual attack is not shown but you see the aftermath with a moderate amount of blood and dead bodies when the elevator arrives at the next floor).
A man is beaten in his office. First, his head is pushed and slammed into the door, breaking his nose, and he is then repeatedly punched (we only hear this from outside the locked door) and then is thrown over his desk. After this, his finger is forced into a cigar slicer and the person beating him pushes down on it almost cutting his finger, but stops after his answers are given. He is then taken hostage, but not further hurt. His face is bloody all throughout the episode.
Lots of characters are killed throughout the series, occasionally quite brutally but most of it is moderate.
In a hospital, there is a chase scene which is somewhat gory. A man is stabbed with scissors - blood spurts out. One man's nose is broken, but the blood is black. At the end, their skins melts into chunks of blood.
In the early season 1 there is a monster with an appearance which is slimy and sticky but not gory.
In season 3 two men die with their bodies melting and all their guts and blood moving by them self to form a monster. This can make any squeamish people watching feel very disgusted and horrified. Most of the show is nowhere near this gory though.
Season 3 and 4 are the goriest seasons. Season 3 contain a LOT of violence but Season 4 is WAY more violent WITH kids being killed in the first episode (Might be disturbing to other viewers)
A character is shown with a bloody nose frequently throughout the series.
A man is stabbed in the neck with scissors. Not too graphic.
Monsters are pretty creepy and frightening
Monsters in season 3 are made out of guts and blood and can be seen as disturbing and graphic
In season 3 a character has a very graphic wound on their leg. Another character then cuts into the leg and movies his hand around under the skin. This is shown in detail and is quite graphic and pretty gory/bloody, but is mostly shown in brief glimpses with half of it focusing ont the characters reactions.
In season 3, a character is thrown into something and is turned into bloody pulp. Brief but easiy seen
Seasons 1 and 2 are milder in terms of brutality, and definitely less frequent in terms of violence. However, season 3 and 4 are much more violent. There are some gory and uncomfortable scenes as the series progresses.
Season 4 is definitely the most violent. It includes 4 different people lifted up into the air by a supernatural force, and their body parts move in all different directions with the sound of bones breaking and eyeballs suddenly disappearing. This is a bit more graphic than usual for the show, but is more weird and frightening than outright gory.
A monster attacks a group of men in a prison as they try and fail to fight back. Most of them are killed and while the deaths are quick, some are quite bloody.
Season 4 is the scariest season by far and maybe the most violent. Several children are murdered by floating into the air before all their limbs snap and their eyes bleed before dissapearing with blood coming out of their sockets. The combat and shooting this season is much more intense and realistic as well.
In season 4, hopper and some other Russian prisoners battle the demogorgan, it is quite brutal because the demogorgan bite their heads off and a fair amount of blood is shown.
People are electrocuted in slow motion, and a pile of blood and flesh is shown. Not too graphic though.
The lab massacre scene in season 4 is the most bloodiest scene in the show so far.
Eleven kills several people using her powers, you see blood coming out of their eyes. Not too graphic but quite disturbing.
In the season 4 finale, a teenager is shown being melted in half briefly. He screams in agony and the shot pans away
A group of jocks plot to murder one of the characters due to conspiracy that he killed one of the jock's girlfriend. They arm themselves with guns and assorted melee weapons to do so.
In Season 4, 4 teenagers have their bones snapped, limbs broken, mouth fractured and eyes bleeding before their eyes get forced back into their brain.
Not gory but disoriented violence
Sometimes there are parts where you may sense gore coming, but it's either a jumpscare or something comedic.
Characters are injured and blood is seen coming out of them. There is gore and blood in all seasons but it is more severe in season four.
In season 4, a traumatic flashback is shown in which it is implied that a baby is burned alive in it's cradle. We don't see the baby, but we see the burning cradle and the baby screaming. Not graphic but very upsetting.
Season 4 is by far the most graphic out of the first 4.