SPOILERS!!
Episode 3: Firefox is killed in an explosion in Minesweeper.
Episode 4: A woodpecker and a crocodile created by the orange stick figure (named "The Second Coming") are deleted. They are never redrawn.
Episode 6: The ViraBot, a four-legged, spider-like entity, is destroyed by The Chosen One's fire, lightning, lasers and powerful punch.
Episode 7: A rabbit-like character is seen unconscious or dead in The Chosen One amd The Dark Lord's attack on Newgrounds.
Episode 8: More ViraBots are destroyed.
Episode 9: Multiple eels, two sharks, a rhinoceros and a bird created by The Second Coming are killed by the Mercenaries.
Episode 10: An eel created by The Second Coming has its head chopped off by an eraser tool.
A non-animated image of a horse is deleted in Episode 4 before it can come to life with the other animations. The animator and the orange stick figure are then seen drawing and animating a winged horse together at the end of the episode.
SPOILERS!!
In Episode 11, a female stick figure named Mitsi who becomes victim's love interest is violently killed by The Chosen One and/or The Dark Lord.
There has been some division in the fandom over this, as some viewers see this as using violence against a female character as a plot device for a male character's hatred and need for vengeance.
Non-graphic gore as the characters are stick figures, but there is violence against them in virtually all episodes, either at the hands of the animator or by other stick figures and/or animated characters. Episode 8 is the most graphic.
SPOILERS!!!
The Chosen One uses fire powers to directly burn other animated characters in episodes 2, 3, 6 and 10. His fire powers are also used against him in Episode 10.
The Chosen One also sets himself on fire with his own powers in episodes 2, 6 and 9, but is seemingly unaffected.
Mitsi is killed by a massive fiery explosion in Episode 11.
No, but in Episode 4, there is a comment on the animator's Facebook page with suicidal ideation. It reads: "I give up on life. I'm not even gonna try any more."
Not specifically 9/11 depictions, but a large tower is knocked over and destroyed by a fireball. More fireballs are launched at towers and there are scenes with damaged and destroyed towers, rubble and fire.
Not a priceless or irreplaceable object, though the animator's computer is destroyed in Episode 3, along with all his files. He gets a new computer in Episode 4.
SPOILERS!!
Episode 2-3: The Chosen one is trapped inside a chest. He is then enslaved as a pop-up blocker on the animator's computer and has a ball and chain around his ankle.
Episode 4: The Second Coming is trapped inside a square box on Adobe Flash. It is so small that he can not stand up inside it. He is released afterwards and becomes friends with the animator from there onwards.
Episode 5: The Virabot is surrounded by a large scribble for a brief moment but escapes almost immediately.
Episodes 9-10: The Chosen One and The Second Coming are captured by the mercenaries and imprisoned. TCO is trapped inside a white room while TSC is kept in a cage before being transported to a room made of forcefields that he cannot escape.
Episode 11: There is a photograph of a mercenary (nicknamed Agent Smith by fans) arresting another stick figure. He is seen restraining their hand behind their back with the lasso tool and putting a knee on them while they lay on the ground.
SPOILERS!!!
Victim, the first stick figure in Episode 1 makes a reappearance in Episode 11. He is shown to have symptoms of PTSD from the abuse he faced at the hands of the animator. He has frightening hallicinations of the animator's cursor/mouse, is initially afraid of touch and is seen drawing pictures of the cursor abusing him.
SPOILERS!!
In Episode 10, victim, a stick figure who was created for the sole purpose of being abused by the animator beats up and abuses The Chosen One. This is likely out of vengeance for TCO killing Mitsi in Episode 11 and for being created with special powers by the animator, giving him a fighting chance, whereas victim has none.
The entire series of Animator vs. Animation (as of Episode 11) does not contain sexual content, and certainly does not contain sexual abuse of any kind.