As stated this will contain the changes that has been made to the anime. Some of the episode may be expanded as there are missing changes that wasn't listed from the site that I have gotten this from.
For Discussion: https://shunkashuutou89.wixsite.com/theworldofjculture/forum/anime/discussion-sword-art-online-anime
Episode 24 - My Hero
None Listed. I will add in when the site that I got this information updates it may take a long time for it to happen or it may not happen.
Episode 23 - Administrator
None Listed. I will add in when the site that I got this information updates it may take a long time for it to happen or it may not happen.
Episode 22 - Titan of the Sword
None Listed. I will add in when the site that I got this information updates it may take a long time for it to happen or it may not happen.
Episode 21 - The 32nd Knight
None Listed. I will add in when the site that I got this information updates it may take a long time for it to happen or it may not happen.
Episode 20 - Synthesis
None Listed. I will add in when the site that I got this information updates it may take a long time for it to happen or it may not happen.
Episode 19 - The Seal of the Right Eye
Several of Kirito's inner thoughts as he sat on the balcony with Alice were omitted, including:
Deducing that Linel and Fizel were likely born within the Axiom Church.
Planning his next move after defeating Quinella, starting with making contact with Rath to stop the incoming Dark Territory invasion.
Deducing that the Underworld was probably the end result of Kayaba Akihiko's research and that the World Seed was likely created for that purpose.
Deducing that Kikuoka Seijirou's goal with creating the Underworld was likely related with Japan's national defense.
The scene where Kirito deduced that there must be a traitor in Rath, who is trying to sabotage Project Alicization, upon discovering the Seal of the Right Eye was omitted.
During his encounter with Quinella, several scenes and some of Eugeo's inner thoughts were omitted, including:
Being stunned by Quinella's beauty, noting she was even more beautiful than Alice.
His brother getting angry over him getting the woodcutter Sacred Task.
Getting angry at his father over him taking his pay for his Sacred Task.
Jink bullying him after Alice got taken away, saying he will now never get married.
Episode 18 - The Legendary Hero
None Listed. I will add in when the site that I got this information updates it may take a long time for it to happen or it may not happen.
Episode 17 - Truce
None Listed. I will add in when the site that I got this information updates it may take a long time for it to happen or it may not happen.
Episode 16 - The Osmanthus Knight
In the anime, the Night Sky Sword did not transform into the Gigas Cedar when Kirito used his Armament Full Control Art.
The scene where the ice that stole the Knight's life scattered to Spatial Resources in the air has been omitted.
The scene where Eugeo talks to Fizel and Linel about how strong Kirito and Fanatio's hearts are has been removed.
Eugeo worrying about the Four Oscillation Blade omitted in the anime.
The insect sent by Administrator to monitor Cardinal that scared Kirito and Eugeo after Fanatio's duel has not appeared.
When the duo is about to resume their ascent, Eugeo's doubts about Kirito's identity were omitted.
In the novel, the color of Elevating Operator's dress is described as sober black, while her dress is blue in the anime.
In the anime, Eugeo thinking of creating an ice rope to rescue the fallen Kirito and Alice before the reconstruction of the wall has been omitted.
Episode 15 - The Relentless Knight
In the Light Novel, the scene where Linel tells Eugeo about the "special exception" Quinella made that allowed her and Fizel to become Integrity Knights was elaborated in more detail.
After the resurrection research was abandoned they needed a new Sacred Task and chose to become Integrity Knights, which Quinella allowed if they killed two newbies. Surprisingly, they succeeded and inherited the "Synthesis Twenty-Eight" and "Twenty-Nine" titles from them.
The mention of Kirito first becoming suspicious of Linel and Fizel because the did not close a door, which he learned from Selka to be custom for a nun-in-training, was omitted.
The fight between Kirito and the «Four Oscillation Blades» was omitted.
The mention of Quinella deeming her experiment to harness the sun's power using mirrors to be a failure, due to the process it taking too long, was omitted.
Therefore, the mention of the reason why she decided to transform the mirrors into the Heaven Piercing Sword being because she did not want them to go to waste was also omitted.
Eugeo's reaction to Kirito's statement that he has continuesly lost to swordwoman was omitted.
Episode 14 - The Crimson Knight
None Listed. I will add in when the site that I got this information updates it may take a long time for it to happen or it may not happen.
Episode 13 - Ruler and Mediator
None Listed. I will add in when the site that I got this information updates it may take a long time for it to happen or it may not happen.
Episode 12 - The Sage of the Library
In the Light Novel, the "Enhance Armament" Sacred Art is a fairly long ritual, but Eldire was able to recite it in seconds.
Because of this, the mention of higher Sacred Arts being harder to cast because they are composed of more words, increasing the chance to make a mistake while reciting them, was omitted.
Because of this, Kirito's shock at Eldrie's casting speed was omitted.
The scene where Eldrie revealed that he can increase the number of whips on his Frost Scale Whip to seven was omitted.
The scene where Kirito throws a shard of the Eldrie's wine glass, which shattered when their Sacred Arts clashed, at the latter, which manages to grace his cheek, was omitted.
The scene where Kirito stares over Eldrie's shoulder as he charges at him, causing the latter to assume Eugeo was attempting to ambush him from behind, was omitted.
The mention of the bones in Eldrie's hand breaking as he caught Kirito's chain was omitted.
The scene where Kirito realizes Eugeo was back on his feet and continued talking to Eldrie about his "summoning", in order to distract him while Eugeo ambushed him from behind, was omitted.
The scene where Eugeo displayed admiration towards Eldrie after he used his "Release Recollection" Sacred Art to block his sword was omitted.
Because of this, the mention of Kirito being surprised Eugeo could still do so in their current situation was also omitted.
In the Light Novel, when Eugeo realizes who Eldrie is he also mentions that he was the winner Four Empires Unity Tournament and had defeated both Sortiliena and Volo Levantein during it.
The scene where Kirito became intrigued in Cardinal after she referred to Sacret Arts as system commands was omitted.
The scene where Cardinal mentions her tea can cure ailments, causing Kirito to realize she told Eugeo to take a bath because she wanted to be alone with him, was omitted.
The scene where Cardinal gives Kirito the rhetorical question as to why the Human Empire had a nobility system was omitted.
The scene where Cardinal explains that when two Underworld inhabitants have children said children will inherit their parents stats, and with it their personality, was omitted.
Therefore, the scene where Cardinal explains that Quinella was born from a political marriage between two nobles, causing her to inherit their thirst for power, was also omitted.
The scenes featuring Quinella's past were Anime Original Content.
In the Light Novel, Cardinal merely told the story to Kirito in the present.
The mention of Quinella's excuse for creating a taboo that limits hunting animals being to prevent overhunting, and hide that it was really to prevent anyone from increasing their stats, was omitted.
Episode 11 - Central Cathedral
The scene where Eugeo was shocked at the strength and speed of the strike Alice used to push him away, claiming he did not even see it comming, was omitted.
The scene where Alice was surprised that Eugeo Life only dropped by 15%, as she intended to drop it by 30%, was also omitted.
The mention of Kirito and Eugeo being surprised that Alice was able to hold both the Blue Rose Sword and Kirito's sword with ease, despite them both barely being able to hold one of them, was omitted.
The scene where Kirito mentions that the way he entered the the Central Cathedral was different from how he expected, as he and Eugeo were being carried to it as criminals, was omitted.
Therefore, the scene were Eugeo realizes Kirito intented to enter the Cathedral was also omitted.
The scene where Asuna remembered how Kirito would always cheer her up following an exhausting Floor Boss in SAO battle, while overlooking his body, was omitted.
The mention of Asuna being set to board the next helicopter back to the main land was omitted.
Therefore, the mention that Aki claimed that Kirito would likely have recovered enough for Asuna to have one talk with her before she leaves was also omitted.
The scene where Kirito considered the underground dungeons of Aincrad to be luxurious compared to the one he and Eugeo were in was omitted.
The scene where Rinko asks whether Higa whether "Niemon" could operate on its own, as she remembered her strangely realistic dream of Kayaba, and he answered that it was shut down was omitted.
The scene where Kirito thought back to his busy schedule to level up quickly in SAO was omitted.
The scene in the prison cell where Eugeo was in disbelief at everthing that had happened was omitted.
Because of this, the scene where Kirito calmed him down was also omitted.
The scene where Kirito deduced that Raios died due to his Fluctlight collapsing was omitted.
The scene where Kirito decided not to feel remorse for killing Raios, as he felt like doing so would dishonor the goblins he previously killed, was also omitted.
The scene where Kirito wonders what Rath's goal is with the Underworld was omitted.
The scene where Kirito wonders why Rath has not attempted to retrieve Eugeo's Fluctlight yet was omitted.
Therefore, the scene where Kirito deduces it to likely be because they simply have not noticed it yet, due to the time acceleration, or were occupied with something else was also omitted.
The scene where Kiroto states that if the underworld had an actual god he would punch that person in the face, thinking of Kikuoka, was omitted.
Therefore, the scene where Eugeo warns Kirito the watch his words, lest the Goddess of Creation Stacia might upon divine retribution, was also omitted.
Because of this, the scene where Kirito realizes that Eugeo has not lost faith in the gods of the Underworld, despite having lost faith in the Axiom Church, was also omitted.
The mention of the entire chain not disappearing because it was made of many pieces, causing only a few chains to dissapear, was omitted.
The scene after Kiroto and Eugeo break out of their prison cell, where Kirito warns Eugeo that they would now be actively going against the Axiom Church, was omitted.
Because of this, the mention of them now, without their weapons, not standing a chance against an Integridy Knight was also omitted.
The mention of the reason why Roses are so rare being because they consume more Life to grow than any other flower, causing them to be forbidden from being planted, was omitted.
The scene where Eugeo thinks that defeating the Axiom Church will allow Kirito to regain his memories, which he believed were lost like Alice's, was omitted.
Therefore, the scene where Kirito told Eugeo he would stick with him until the end of their journey was also omitted.
The scene where Kirito and Eugeo use a Sacred Art to locate their swords was omitted.
Episode 10 - Taboo Index
Eugeo's inner thought that the stormy weather was a manifestation of Alice's displeasure, that it was taking him so much time to save her, was omitted.
The scene where Eugeo asks Kirito whether he has thought of a name for his sword yet was omitted.
Eugeo's belief that, even with the authority granted to them by school rules, Raios and Humbert could not harm Ronye and Tiese, due to Imperial Law and the Taboo Index taking precedence, was omitted.
The mention of the ropes Raios and Humbert used to bind Ronye and Tiese being strict, to prevent the former duo from breaking the Taboo Index by accidentally decreasing the latter duo's Life, was omitted.
The scene where Raios throws himself onto Tiese was anime original content.
Eugeo's inner thoughts and criticism of the Taboo Index, as it allowed Raios and Humbert to do as they pleased with Ronye and Tiese, were omitted.
Tiese telling Eugeo not to get involved, as it would lead to him breaking the Taboo Index, was omitted.
The scene where Eugeo sees an image of Alice as Tiese is about to be violated was omitted.
The mention of Eugeo being paralyzed from shock after cutting off Humbert's arm was omitted.
Raios' claims when he is about to execute Eugeo, about how even his father and uncle never killed before and that this would allow him to surpass Volo Levantein, were omitted.
The mention of Kirito using Serlut Style «Whirling Current» to counter Raios' «Avalanche», as there was not enough room to use «Vertical Square», was omitted.
The mention of Kirito's «Whirling Current» reactivating due to Radios' «Avalanche» pushing it back to its pre-motion stance, restoring its strength and allowing it to overpower Radios' skill, was omitted.
The mention of Sortiliena having used the same strategy against Volo was also omitted.
The scene where Kirito offered Raios a rope to stop his bleeding was anime original content.
The mention of Raios' death being the result his Fluctlight collapsing, due to being torn between obeying the Taboo Index and committing a Taboo, was omitted.
The mention of Kirito and Eugeo only being guilty of decreasing another's life, as Raios' Fluctlight collapsed on its own, was omitted.
Episode 9 Nobleman's Responsibilities
The scene of Kirito not being able to go to the practice hall with Eugeo, because he had to study for an upcomming Sacret Arts exam, was omitted.
Details regarding how Eugeo and Kirito become the 5th and 6th Elite Swordsman-in-Training respectively were omitted.
The scene where Eugeo recalls his final meeting with his senior, Gorgolosso, was omitted.
The mention of Eugeo's right eye beginning to hurt whenever he became critical of the Underworld's laws was omitted.
The scene during Eugeo's and Humbert's sparring match, where Eugeo refuses to accept that the Goddess of Creation, Stacia, would tolerate Humbert infusing his swords with hubris, was omitted.
Details regarding Humbert's "strange orders" to his valet, Frenica Szeski, were omitted.
The mention of a prophecy that one day the Dark Territory would invade the Human Empire was omitted.
Because of this, the mention of nobles being able to enjoy luxurious lifestyles because they are expected to in exchange fight on the front lines when this time comes was also omitted.
The scene where Kirito and Eugeo entered Radios and Humbert's room and Humbert wanted them to leave, until Radios allowed them enterence, was omitted.
The scene where Raios and Humbert defend Humbert's treatment of his valet, by bringing that up Eugeo previously stripped before Gorgolosso to check his muscles, was omitted.
The scene where Eugeo tried grabbing his sword while Humbert talked about his "strange orders" to his valet, even though she was not carrying one at the time, was anime original content.
In the Light Novel, Eugeo was only considering drawing his sword.
The scene where Eugeo thinks back on his life and how far he has come was omitted.
Episode 8 - Swordsman's Pride
Kirito's doubt whether it was okey for him to duel Volo, as he was Sortiliena's rival, was omitted.
The scene where Kirito was reminded of Kuradeel as Volo took his stance to perform «Avalanche» was omitted.
Therefore, the scene where Kirito briefly considered using «Arms Blast» against him, before abandoning the idea out of concern for breaking his own sword instead, was also omitted.
The mention of the figures behind Volo when his and Kirito's swords clashed being the former heads of the Levantein family was omitted.
The scene where Volo sees an image of the Gigas Cedar behind Kirito was anime original content.
The scene where Sortiliena scolded Kirito, by stating he should have just surrendered, was omitted.
Therefore, the mention of Kirito not knowing he could have just surrendered was also omitted.
In the Light Novel, the scene where Sortiliena told Kirito of the history of her Serlut Style and why she chose him as her Valet took place after their sparring match.
The scene where Kirito realized Raios and Humbert being able to destroy his flowers was because the earth they were planted in technically did not belong to him, as the Taboo Index forbids the destruction of another's property, was omitted.
The mention that Kirito would have cut Raios and Humbert down if he had a sword with him was omitted.
The graduation duel between Sortitiena and Volo was anime original content.
In the Light Novel, it was quickly glossed over in a short sentence.
The mention of Sortitiena being defeated in the Four Empires Unity Tournament by a member of the Norlangarth Knights was omitted.
The scene where Kirito saw an Integrity Knight returning to the Central Cathedral was omitted.
May expand more later.
Episode 7 - Swordcraft Academy
The events of the entirety of Chapter 3 were glossed over in a short montage.
Because of this, Charlotte was not introduced.
The scene where Kirito and Eugeo encounter Sortiliena while walking through the streets of Centoria was anime original content.
The scene where Sortiliena told Kirito of the history of her Serlut Style and why she chose him as her Valet, after their sparring match, was omitted.
In the Light Novel, the scene of Kirito retrieving the top branch of the Gigas Cedar took place before he and Eugeo left Rulid Village, instead of in a flashback.
In the Light Novel, when Kirito successfully swung his new sword, it caused a shockwave that accidentally cut a shield that hung on the wall in two.
Because of this, the scene where he was afraid Sadore would demand compensation was omitted.
The scene where Sadore tells Kirito to think of a proper name for the sword was omitted.
The scene where Kirito registers the sword with Azurika to allow him to keep it at the dorms was omitted.
Because of this, the scene where Azurika asks Kirito about the sword's memory was also omitted.
Details regarding Kirito not being allowed to practice due to it being Rest Day, to explain why he tested his sword in a remote clearing, were omitted.
Because of this, the mention of Volo Levantein also wanting to practice in secret was also omitted.
May expand more later.
Episode 6 - Project Alicization
In the light novel, Yui was the one who explained the concept of «Top-Down AI» and «Bottom-Up AI» during Asuna's, Leafa's and Sinon's meeting in ALfheim Online.
Because of this, Asuna already understood the basic concept when Seijirou brought it up.
Details on how the Rath staff who raised the original eight Artificial Fluctlights exited the Underworld were omitted.
Details regarding mankind's present disposition towards war and the current political climate, to explain why AI's designed for military purposes have become increasingly necessary, were omitted.
Details on how the memory blocking procedure works were omitted.
Details regarding Kirito's second childhood in the Underworld were omitted.
Details regarding possible side-effects from Kirito spending years in the Underworld were omitted.
The scene where Asuna explains the situation to Leafa, Sinon, Lisbeth and Silica in Alfheim Online was anime original content.
In the light novel, when Rinko confronted Kayaba following the outbreak of the SAO Incident, she was carrying a gun rather than of the knife.
The scene of Kayaba's and Rinko's first meeting and growing relationship was anime original content.
The scene where Rinko sees Kayaba in a dream was anime original content.
Episode 5 - Ocean Turtle
Laughing Coffin raid flashbacks were anime original scenes.
The entire scene of Kazuto being loaded in an ambulance and his heart stopping was omitted.
In the light novel, Asuna did not notify Suguha and Midori until after Kazuto's operation was over.
Therefore, the scene of Asuna, Suguha and Midori at the hospital was anime original content.
The scene of Seijirou convincing Midori to place Kazuto under his jurisdiction and supposedly transfer him to a military hospital was anime original content.
In the light novel, Lisbeth and Silica were not present at Asuna's, Leafa's and Sinon's meeting in ALfheim Online.
In the light novel, Asuna, Leafa and Sinon quickly deduced Kirito was at the Ocean Turtle from information previously given to them by him at the Dicey Cafe and news reports on the facility.
Therefore, the scenes where Asuna, Suguha and Ryoutarou search the harbor while Shino, Rika and Keiko check Rath's facility in Tokyo was anime original content.
In the Light Novel, Yui also explained the concept of «Top-Down AI» and «Bottom-Up AI» at Asuna, Leafa and Sinon's meeting, using herself as an example of «Top-Down AI».
The scene of Rinko's and Akihiko's past relationship was anime original content.
The scene of Rinko receiving Asuna's E-Mail was anime original content.
May expand more later.