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You could've stopped me, but you just watched, as this happened!
~ Anticepticeye's catchphrase

Antisepticeye, or Anti in short, is one of the main antagonists of the famous Irish YouTube channel Jacksepticeye.

He was portrayed by Seán William McLoughlin.


Antisepticeye is a darker and evil version of Jacksepticeye. The general idea is that he is a demon, or virus, that is fighting for control over Jack's body. Antisepticeye's personality is usually demented and with a strong desire to harm others. It is thought that the fan-made Darkiplier had fueled the idea of Antisepticeye.

Since the beginning of October 2016, there have been brief clips within Jack's videos that resemble Antisepticeye. They began in his playthrough of Five Nights At Freddy's Sister Location. In the description of these videos, there are ominous messages and sometimes links using zalgo font that add to the persona.

As well, Jack's Twitter and Tumblr accounts have featured the same font and personality, suggesting Antisepticeye is "taking over". Even in videos where Antisepticeye is not present, the white board on the door will occasionally contain vague messages that relate to him. When fans ask about or point out Antisepticeye, Jack responds as if not knowing who they are talking about.

Additionally, Jack's Twitter account has changed from Jacksepticeye to A̸͢n҉t͞isepticeye.


In Facerig episode three, Jack uses a flower face named Flowey from Undertale; while using it he says "down here, it's kill or be killed." After this, Antisepticeye's laugh is heard, however Jack might just be goofing around.

On Halloween (October 31, 2016), Jack made this video, officially confirming Antisepticeye's arrival. In this video, Jack is seemingly recording an innocent vlog of him carving a pumpkin (similar to the previous year 2015). The white board on the door has the words "Happy Halloween!" written on it. As the video continues, an eerie laugh is heard and the camera becomes distorted. Jack briefly steps away from the camera to investigate. He returns to the camera, acting rather strangely, and continues carving the pumpkin.

Then, the sound of someone stomping can be heard, and Jack once again leaves to look for the source of the sound. At random intervals, the camera turns distorted just as before, but Jack remains oblivious. At one point in the video Jack's nose starts to bleed and he briefly steps away from the camera to get some tissue. When he comes back he pretends it never happened. Towards the end of the video, Jack stares blankly at the camera and begins to slit his throat with the knife in his hand, causing him to bleed to death and fall onto his pumpkin.

After many seconds of silence, Anti possesses Jack and jumpscares the viewers. The words on the whiteboard are now scribbled out. Anti jeers at the viewers, blaming them for Jack's death. He says the viewers could've stopped him from doing it, but they just watched. He declares that Jack is "gone forever" and asks the viewers to say their goodbyes. Finally, the video cuts to black and ends.

3 months later in January 2017, the all too familiar static and sounds can be heard in Jack's videos.

6 months later in July 28, 2017, Markiplier made a video on his channel titled "DARKIPLIER vs ANTISEPTICEYE". During the video, the two were arguing about who should be "king" of their "realm" (dubbed "YouTube Hell" in the comments). The two were about to fight, however they were constantly disrupted by other YouTubers dark sides (ABlazingPhil (AmazingPhil), DannyDarko (DanTDM), Sharkyoho (Schmoyoho; second and songify channel of the Gregory Brothers), etc). Then Chica, Dark's dog, appears and sucks the other dark sides into a void. She becomes angered, saying that Dark didn't feed her. As Dark panics, Anti stares at the screen (actually staring at Chica), laughing. Anti played a more insane role than a serious, evil one. BioInc3

6 days later on August 3, 2017, Anti appears in Bio Inc. Redemption. At the start of the video, Jack explains that the developers made an Easter egg of him in the game. Then he starts feeling 'sick', so rushes off camera. Dr. Schneeplestein replaces him and vows to save Jack in game. Halfway through, Dr Schneeplestein himself complains of discomfort and makes references about death and Anti (such as 'antidepressants'). Anti glitches into the face cam and game more frequently, taking over Dr. Schneeplestein.

When in-game Jack finally dies, Anti appears. He berates the viewers by saying he's tired of repeating the same cycle (quote: "How many times must I do this? Again and Again! OVER and OVER! FUCKING CIRCLES!") meaning he is tired of killing Jack just so Anti can appear to please the audience. He also mocks the viewers when they call him "glitch bitch" (a nickname fans gave him online). He asks a few questions, such as "who do you think you've been watching all this time?" responding with "my puppets". He states that this is his world and this isn't the end of him. The video cuts to black as he giggles and says "see you soon".

83 days later on October 25, 2017, sounds and effects related to Antisepticeye appears in Opening Tour Gifts. When he receives a knitted Anti doll, Jack says, "little anti. Look at him glitching out all over the place." A sound of giggling can be heard and the screen glitches. This happens a second time when Jack presents a painting of Anti someone made for him, with the screen glitching.

2 days later on October 27, 2017, while Jack and Robin play Overwatch and Robin fall to his death after jumping himself to it, Jack made a little giggle laugh, but it was unsure if it was Anti who was laughing.

On Jack's Twitter you can also see tiny glitches if you look closer.

4 days later on October 31, 2017, Jack makes a pumpkin carving video for the third time. He starts the video off normally, but then suddenly changes to black and white 1930s silent movie style, complete with appropriate attire. He carves the pumpkin with a face drawn on it similar to his own face. Towards the 5:25 mark, he accidentally cuts himself. While treating himself, Anti starts glitching into the scene, taking over Jack's new persona. He makes the slitting throat action and leans towards the camera, while title cards show up on screen saying 'Puppet' and 'SMILE'. The video ends with Jack performing the usual outro.

Since 10pm GMT on December 15, 2017 until 6pm GMT on December 16, 2017, Jack's live stream for 'Save the Children' was hijacked by Antisepticeye. After leaving CCTV footage overnight, with creepy sounds and glitches, when Jack and co return for the second stream, the alphabet on the wall spells out 'ANTI'. After welcoming the audience back to the stream, Jack hurries to get changed; while doing so, a reiteration of Anti from the Bio Inc. video appears in the window, only for Jack to return to describe the unusual tension in the air.

While opening gifts to donate to the charity, Ethan receives a decapitated teddy bear, with PJ saying the cut looks like its done by a knife. When a donor leaves a message, saying they "love Jack, Robin and Anti", Jack questions Robin asking: "Who is Anti?" The hashtag #Overnightwatch was used and multiple videos have been recorded of Anti's return. Fans (over 10,000-4,000 of them) stayed for over 24 hours to see Anti's arrival, some appearances took hours to see. Many people have realized how videos, pictures, and quotes from the stream come from some of his previous sightings.


On March 9th, 2018, in the video titled 'BABY GOT BACK | Baby Hands VR (HTC Vive Virtual Reality Wireless)' at exactly 3:44, Antisepticeye is heard faintly in the background saying "Where is he?" The hint is very subtle and is difficult to notice without audio enhancement. Jack Stories Untold Jack's face in Watch This With The Lights Off

On May 5th, 2018, in the video titled 'WATCH THIS WITH THE LIGHTS OFF' at the end of the episode, Jack is disrupted by creaking noises and his door opens. Jack's surprised face briefly appears for a second on the in-game 'Futoro 128k +2' computer monitor as from Anti's point of view at the door.

On May 6th, 2018, in the video titled 'Barry Has A Secret' at the end of the episode, the screen fades away to someone (possibly Jack) finding a small toy hand in a cabinet. Jack turns around and Anti, looking like Jack himself, says, "You weren't supposed to find that," and then he grabs Jack as the video fades into the outro.

In another May 6th, 2018 video titled 'THEY ARE LISTENING | Stories Untold - Chapter 2' at the end of the episode while doing his outro, the screen begins flashing like one of the alien entities trying to access his mind similar to what occurred to his character while he was playing in game. A brief sound of the klaxon used during the alien escape is heard. Suddenly, after hearing the klaxon, an alien entity appears over the screen, then the next moment Anti glitches in during the light flashes. The video then cuts to an image of all the alien entities hovering together in a group. The video's outro is left unfinished.

On May 7th, 2018, in the video titled 'THEY'RE HERE! | Stories Untold - Chapter 3' as the video comes to a close, muffled voices can be heard as Jack finishes speaking. The video goes to black suddenly and a voice can be heard saying 'Jack! This is Chase. You need to wake up.' Also, The Morse Code transmitting on the radio spells out " W.H.E.R.E.A.M.I."

On May 8th, 2018, in the video titled 'IT WAS ALL CONNECTED! | Stories Untold - Chapter 4' the video suddenly goes to black after Jack finishes the game and it goes to Jack, asleep, yet tossing and turning. He wakes up suddenly, looks at the camera and says, "I remember what he did to me."

On May 9th, 2018, in the video titled 'Try To Fall Asleep!' Jack didn't do his intro, which caused many fans to speculate that it was not Jack making the video. More fans began to point out how he wasn't doing his outro and that he was playing a lot of horror games.

A video titled 'Dark Silence' was posted on May 14th, 2018. After the game ends, Chase is shown in darkness, frantically flicking on a lighter. He wanders around and goes upstairs. In the doorway, bathed in red light, he finds Antisepticeye. Chase shouts out, "Who's there? Where are they?! What do you want from me?!" before Anti turns around, grinning and walks towards him. Jack with blood tears Jack bleeding from the eyes in Exploring an Abandoned Hospital

On May 16th, 2018, near the end of 'EXPLORING AN ABANDONED HOSPITAL | Exiles', as Jack was doing his outro, he is suddenly cut off and stares straight at the camera, bloody tears streaming from his eyes. Whispers filter in saying "It's all your fault." Distorted music replaces the usual upbeat techno music during the outro animation, with the animation playing in reverse and is red instead of green.

On May 22nd, 2018, near the end of the game 'First Winter' Anti glitches into the face cam twice.

On August 3rd, 2018, Jack released an Akinator video titled 'HOW DID HE GUESS THAT!?' During the questions to guess Jameson Jackson from Akinator, the camera on question 11 "Has your character killed people?" glitches out after Jack mentions that he has dug himself in a hole and the video jumps to the next question. On question 28 Jack refused to answer "Is your character a puppet?" Also after the outro song ended, in place of the after outro gags he does, a distorted video of Jack appearing to be screaming is shown along with some distorted audio, which turned out to be Antisepticeye’s laugh slowed down. The waveform of this particular segment spells out “SOON”.

On August 5th, 2018, at the end of 'WHAT AM I EVEN PLAYING?! | Eggs For Bart' after the outro song, a reversed voice is heard, saying "I will return when you least suspect it." The waveform of the reversed audio is code. When the code is deciphered, it is translated to say “DEATH”.

On September 25th, 2018, in the first ten minutes of 'WHAT THE HELL HAPPENED?' of the game Transference the video's title was in Zalgo font, which translated into "HELP". The title reportedly changed three times before changing to the current title. A total of four Anti glitches were seen in the episode, albeit very briefly and for a split second, such as at the time of 14:52, Jack begins to tilt his head and glitches.

On October 14th, 2018, four glitches could be seen along with creepy talking in '3 SCARY GAMES, 1 VIDEO #7'. Although there was no physical appearance, one particular glitch shows Jack where half of his body was green for a split second in the face camera and his voice was distorted while saying "Time to take off the masks". On October 20th, 2018, two glitches could be seen in ‘THIS GAME SCARED THE **** OUT OF ME’.

On December 1st, 2018, in the video 'TIME IS BROKEN | Umfend' the camera can be seen glitching twice. The second time is accompanied with Jack saying ”Do you remember?”

Glitched outro Glitched outro in Wait For The Ending!

On December 7th 2018, the usual outro animation became glitched at the end of the video 'WAIT FOR THE ENDING! | Sally Face - Chapter 4 - Part 1(Full Game)'.


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