Kirigaya Kazuto, better known as the Black Swordsman Kirito, is breaking down the gates of the World Tree alongside his sister Suguha in a desperate effort to save the love of his life from a psychopath with delusions of godhood.In another world, the third daughter of one of Halkegenia's most prominent noble families, Louise François Le Blanc De La Valliere, tries desperately to summon a familiar and shed the mocking title of 'zero'.She succeeds, relocating all of Alfheim, Cardinal, and 61,000 players into Tristain and inadvertently foiling Kirito's assault on the World Tree.Halkegenia Online (Fanfiction.net) is a Sword Art Online/Zero no Tsukaima crossover fanfic by Triggerhappy, a product of Spacebattles' continued mission to cross over ZnT with absolutely everything ever. Notable for awe-inspiring weekly update speed paired with above-average quality, strong characterization, and smooth pacing.The Fanfiction.net link above leads to the first arc of the story. The second arc, Halkegenia Online v2.0 (Fanfiction.net), is also complete.Arrun Parallel Story: Melancholy Heart is an interim story taking place alongside the events of the second arc.Halkegenia Online:Beach Episode is another side story taking place parallel to Chapters 10 and 11 of 3.0.The third arc, Halkegenia Online v3.0 (Fanfiction.net) is in progress.The collected omakes/sidestories are being published under the title Halkegenia Offline!.The character sheet can be found here and lists the tropes related to individual characters.See Sword Art Online and Zero no Tsukaima for tropes related to the original works.
The Alcatraz: La Forace Prison, when it was active, had been rumored to be impregnable.
All or Nothing: Operation Dunkirk. If it succeeds, the rebels will be set back for months. If it fails, Tristain will be left with virtually no air force.
Same goes for Reconquista's plan in the second arc. If it succeeds Tristain is effectively theirs without needing to fire a shot and they even gain an exceptional general whose loyalty will always be beyond doubt. If it fails their entire network of spies, saboteurs, and sympathizers in Tristain gets blown wide open, leaving Princess Henrietta free to consolidate her control over the government to the point where she will be impervious to any future attempts at subversion. And the Tristain-Fae-Albionian Royalist Alliance will now be totally unshakable, leaving Albion with no choice but a bloody, brutal invasion.
The All Solving Hammer: In 3.0 Sheffield lampshades the tendency of the Halkegenian nobility to solve everything with magic, noting that a simple tumbler lock would have inconvenienced her much more than the old, extremely powerful enchantments.
All There in the Manual: Most of Rute's answers to economic questions during the debate include mention that he'd already been discussing that issue, in detail, on the messaging boards.
Alternate Universe Fic: At first it looks like events will proceed mostly the way they usually do, though Louise doesn't get her familiar. Then Asuna and the Knights of Blood wind up in Albion, and everything goes completely off the rails.
Ancient Conspiracy: The Church is keeping birth records and investigating mages claimed to be failures to find users of the void, and has been doing so for generations.
Animorphism: The Beast Form, and its specialized Cait Sith version.
Are We There Yet?: Pippin continuously asks: "Is it ready yet?" while Tiffa is making dinner.
Asskicking Equals Authority: For the Vespid Knights, whoever defeats the current leader becomes the new leader of the knights. This is how Sayuri became leader only to be defeated by a newly blossomed Botan, a Pixie who's more willing to seek a peaceful resolution with humanity.
Authority Equals Asskicking: Princess Henrietta, and all of the human officers to a varying degree, since most of them are mages. On the Fae side, General Eugene, Asuna, and the faction leaders all kick a significant amount of ass.
Badass Crew: The Salamander Lord's personal guard. A minimum entry requirement is slaying a flying dragon singlehandedly.
Badass Decay: In-Universe example. Titania was originally written in ALO as a power in her own right who stood up to Oberon (Sometimes to the point of outright war) to protect the Fae and mob races she loved. Sugou was in the process of rewriting her character to be a submissive wife who offered her body to Oberon to purchase his mercy towards those races as part of his plan to cast himself as Oberon and warp Asuna into Titania. Asuna did not like learning what kind of personality Sugou was planning to give her when she found out about it, though at least some of the mob races that recognize her as Titania remember Titania's original depiction. At least one of them (Octavia) is aware of both depictions and wants to know what happened to her.
Beach Episode: In v3.0. Business and relaxation alike ensue, and then that night, suddenly a boss battle happens!
Becoming the Mask: Discussed. Morgiana says she is willing to become her faerie persona for real if that's what it takes to keep the fae safe. Also the fae are starting to manifest more and more "racial" traits as time goes on.
Bee People: The pixies have many similarities to insects. They are a One-Gender Race born in a symbiotic relationship with their Garden, and have a caste system, with the Knights acting as guardians, and Shamans as the spiritual leaders. They also undergo a Blossoming (i.e metamorphosis). There is no queen as such, but Yggdrasil can be thought as a cross between one and a deity.
Better to Die than Be Killed: After running into zombie Fae, Caramella asks Wales to incinerate her if she is killed or too wounded to escape.
Beware the Silly Ones: The Djinn. Who first show up as comic relief due to being an annoying but ultimately harmless mob that speaks in broken statements. People find it cute. Then Asuna gets in trouble and the Djinn she befriends goes to rally all the other Djinn until they combine into a huge monster capable of fighting Octavia - one of the most powerful Boss Mobs in existence.
Beyond the Impossible: Colbert is initially dismissive of the idea that Louise summoned Alfheim's World Tree because it would be impossible for a single mage to summon such a humongous thing. Even if she were to attempt it she would surely died from willpower exhaustion; "One hundred mages would kill themselves..." Alicia agrees because, from her side, she can't imagine summoning happening at all. Lady Sakuya convinces them both with the following logic:
''What I'm saying is impossible. But as Kirito-kun said, an impossibility cannot be disregarded when we have observed it."
Big Damn Heroes: Wales and Kino save Caramella at the last second, but Asuna and Arguile have to rescue all three of them minutes later.
Cassandra Truth: Louise collapses of willpower exhaustion in the short timespan between her summoning ritual and Alfheim's manifestation in Tristain. Kirche is the first to put two and two together but both Osmond and Colbert brush off her suspicions on the grounds that the strain of summoning something so huge would kill any single mage to attempt it.Though there is some evidence that they are at least willing to entertain the possibility at least in private, because they are at such a loss as to how to explain it, nothing can be ruled out.
Chef of Iron: Asuna is the this, as is Drake, though Asuna extends her repertoire beyond the "ordinary" subtype as seen in 3.0's Beach Episode when she is dealing with seafood.
Chekhov's Gun: Kino idly noticed some gunpowder stocks during the Fae's reconnaissance of York. He later ignites them to provide a distraction for their escape.
The Resurrection potions carried by Midori are later used to save Wales' life following Wardes' treachery.
Cliff Hanger: An oft-lamented feature of the story. It's rare for a chapter (part) not to end in one.
Cool Plane: The Mitsubishi A6M2 Zero Fighter was replaced by the UH-1 "Huey" Iroquois helicopter.
"Mort, this is a really bad idea. A really, really, bad idea." [Morgiana] breathed as she unsheathed the almost ceremonial looking knife that she carried at her waist, twirling it easily before sinking the blade through York on the map. "Lets do it!"
Curbstomp Battle: Despite a huge number of setbacks along the way, Operation Dunkirk is a resounding success, attaining all of its major objectives, and yielding hefty secondary benefits for the Allies, while they suffer only light to moderate overall casualties in return.
The conspirators at La Forace Prison believed they could hold off an assault long enough for their leaders and prisoners to escape, and for any potential evidence to be destroyed. Boy were they wrong.
Custom Uniform: The assorted Fae volunteers (except for the Salamanders), due to being former players, have a wide variety of gear.
One of the reforms Lord Mortimer is trying to pass is the standardization of Tristain's military uniform and equipment.
Deader than Dead: If you don't do this to the Zomfae (by incinerating them), they'll just keep getting back up again. Aki has been blown to pieces with a cannon at point blank range, pulled herself back together again only to be smooshed into jelly by a collapsing roof a few minutes after regaining the ability to walk... and she's still 'alive'.
Democracy Is Bad: Many Tristainian Nobles (Karin especially), are less than impressed by the Fae's ideals regarding government.
Justified since every Democracy Halkegenia has ever had have been fairly short lived governments that typically imploded on themselves - So Tristanians are simply basing their judgements off of historical evidence. Colbert speculates the reason Fae democracy works might be due to literacy and huge accumulation of knowledge.
Demoted to Extra: Due to loss of the Harem Comedy Elements from the Zn T half of the source material, Siesta's relevance to the plot has been reduced to effectively nothing. She has a few appearances in the first arc where she is tending to Louise immediately after the Transition and appears in one omake as the Kirigayas' housekeeper, but she hasn't been seen since the Tarbes arc.
Deus Ex Daughter: Probably Kirito's point of veiw when Yui HACKS Cardinal and upgrades his Beast Form to full Gleam Eyes during his fight with the Raid Boss near the Yggdrasil shoot.
Dirty Business: Arguile and Prince Wales execute the captive mercenary, so that Asuna doesn't have to.
Disaster Democracy: The primary demand of Regin and Ryo, the two main opposition leaders in the Second Arc. Though the former is simply interested in having a government more legitimate than, "whoever was in charge at the time of the Transition," while the latter is a blowhard self proclaimed rival of Sakuya trying to make a play for power now that things are relatively calm.
Disguised in Drag: Kirito invokes this with Spriggan illusion magic, taking the appearance of his notoriously feminine GGO avatar as a disguise for the rescue mission to Albion. Only, he's actually female in that form.
The Trividual: Shiori is a special case, in that she's three Cait Sith, sharing one mind.
Due to the Dead: Caramella and Kino erect a small symbolic gravestone with the names of the zombified players. A more formal ceremony is also planned.
Elephant in the Room: Alicia is forced during the debate to publicly point out the really big one: That the Fae of ALFheim might be here forever.
Emotions VS Stoicism: Rare in that it's technically a one-person war. Karin has to deal with this due to a mana potion completely replenishing her willpower reserves, but at the same time causing her to completely lose control over her emotions. She's now struggling to regain it.
Everything Trying to Kill You: All of Alfheim's mobs and field bosses got 'ported over along with the players and the architecture, making this true for Tristain. The already hostile wilderness has this upped to Death World levels.
Note that monsters already present in Halkegenia are not immune to this, either – patrols have found whole clans of Orcs slaughtered by local mobs. Between this and said mobs being as territorial as they are, Tristain could arguably be said to be safer now than it was before.
Evil Cannot Comprehend Good: Sayuri goes nuts over why the Pixies that were born from the same nest as her choose to side with the humans. She refuses to believe that the humans who took care of them are good people and accuses the humans of using magic to tame and mind-control them.
Extra-Strength Masquerade: The sapient mobs have cognitive blocks in place which keep them from comprehending that ALO was only a game. With the exception of Solomon.
Exact Words: Asuna gets Kirito to promise to get an outfit that isn't black. He promptly buys a dark blue outfit so close to black that it looks black to everyone who sees it other than Yui.
Digby swears that Richmond will not be harmed by any man or woman under his command. He then immediately relieves Ephi from his service.
Eye Scream: Fernand loses an eye due to Sayuri's last ditch attack, distracting him long enough for Count Arthur to finish him.
Fantastic Racism: The Tristainians are deathly afraid of elves and the fairies happen to look like elves with wings. It takes some fast talking and good diplomacy on multiple fronts to keep this from being applied to the fairies as a whole, but it works for the most part.
Played straight with Reconquista but averted with some of the common folk of Albion. The rebels didn't get the memo about the fae and treat Asuna and the SAOvivors as heretic elves. Royalist sympathizers ironically mistake them for a group of native fairies spoken of in folktales who are said to be ancient allies of the crown.
Sayuri the Pixie hates humans because a group of them burned down her home nest. This has led her on a campaign to drive the humans out of Tarbes.
Ephialtes hates humans and considers them, even those who are mages, to be inferior to Faeries in every way. This is very much the result of his own rage at his life pre-Transition.
Lord Justice Richmond hates the Fae and considers them sub-human.
Humans living in and near Gaddan have taken to dying their hair red and covering their ears to avoid harassment from the "locals".
Dormant functionality of the Cardinal has been activated.
A later chapter shows that she's aware that Yui is the daughter of Kirito and Asuna, and that she knows both of their full, human names.
Skuld finds a strange, levitating stone in the body of a baby Jotunn.
Four Lines, All Waiting: The story switches viewpoints a lot in the first few chapters, ranging from Louise to Henrietta to Asuna to Kirito pretty randomly. Near the end of the "meet and greet" phase the politics are mostly dropped and the story focuses on Asuna and Kirito trying to get back to each other.
It happens again during the Tarbes Arc, which was originally intended to be a roughly four chapter diversion and spun out of control into a complete side story right in the middle of the Albion arc.
Back with a vengeance in the second arc, with Novair's murder, the search for the missing Pixies from Sayuri's garden, political tensions among the Fae, as well as ongoing story lines involving the war with Albion, Louise's magic, and Yui's attempts to communicate with Cardinal. It turns out the murder, the missing Pixies, and the political tensions all had connections to a Reconquista plot - though they don't actually find the missing Pixies.
And in the third arc we have Morgiana's pregnancy, the creation of the Yggdrasil Knights, Dunwell rebuilding the Fourth Squadron, Shiori's infiltration of Albion, Matilda's attempt to steal the Heel Stone from Kingston, Yui's first day of school and meeting of Bardiche and Balandene, etc.
Four-Star Badass: General Eugene and General Gramont. Prince Wales might also qualify.
From Bad to Worse: Asuna and the research subjects. On the upshot, Sugou apparently wasn't logged in when the transfer occurred, and the changes to the game world busted the lock on Asuna's cage and woke up the other SAOvivors. On the other hand, their only escape route dumped them in Albion, right in the middle of a civil war. Out of the frying pan...
Good News: It looks like the Windstone Catastrophe, the impending apocalypse in canon has been delayed. Bad News: It is because some of the Windstones are being turned into Ice Giants.
Full-Circle Revolution: Cromwell is continuing many of the Royalist policies that inspired people to rebel in the first place.
Gondor Calls for Aid: Downplayed in that Kirito never actually asked for their help, but a host of SAO survivors including Agil, Klein, Lizbeth, Silica, and Argo followed the rumors of Asuna's appearance in ALO and jumped into Alfheim to help Kirito just before the transport.
Julio's plan. So, you wanted to confirm your suspicion and spirit away Tristain's void mage if proven right. You succeeded. Congratulations. Now everyone in the country is aware of your attempt, and Karin has seen you, and might be able to identify Romalia as the culprit (even if she doesn't the Fae will in short order), meaning Louise is next to useless for any long-term plans, and you might have just helped the pope commit political suicide.
Grey and Gray Morality: The Reconquista Rebels and the Albion Royalists. Some of the people fighting on both sides truly believe in their causes but many of their leaders are evil and do nasty things to the commoners whether they be friend, enemy, or neutral.
Becomes less ambiguous as we get a closer look at Albion society in v3.0. King James is confirmed to indeed be a tyrannical ruler, whose abuse of power and neglect of the lower classes is the driving force behind the civil war. It changes the moral dynamic somewhat in that the Reconquista Rebels actually become pretty justified, and are just the victims of opportunists, while the Royalists are mindlessly following a tyrannical regime and seemingly have no real excuse.
Hidden in Plain Sight: How Matilda intends to hide Tiffania in Tristain after getting her out of Albion. Sylphs look a lot like Elves and Half-Elves, so Tiffa can be covered as a Sylph who doesn't like flying.
I Have You Now, My Pretty: Ephialtes and Sigurd do this to Sakuya in Chapter ten of the second arc, in a twist they do this while being totally oblivious to the fact that their plans are being ruined utterly.
Impoverished Patrician: The Montmorency family appears to be this. The fact that half their lands disappeared during the Transition didn't help. And they aren't the only family whose fortunes have declined because their lands disappeared and were replaced by Fae settlements that the Treaty of Arrun doesn't allow them to tax. Members of several of those families end up joining Reconquista in the hopes of getting rid of the Fae.
Jailbait: Klein has to keep reminding himself that even though Leafa the Sylph looks like an adult, Suguha the human isn't.
Kill It with Fire: The Fae now have a policy of cremating all of their dead, so that they can't be used as zombies.
King in the Mountain: Albion has legends about the Fae queen coming to its aid in an hour of need. Then Asuna and the Knights of Blood show up in the middle of a civil war.
Last Stand: King James decides to stay behind in Newcastle and fight to the last.
Lethal Joke Character: Kino. In SAO his inability to stick to a single set of skills turned him into a Master of None who wasn't worth much in combat and wound up being used by his guild as an errand boy. In Halkeginia, however, his skills have proven to be far more useful, giving him flexibility unmatched by front-runners who specced for full combat builds like Asuna.
Little Bit Beastly: ALO already had Cait Sith, but Halkegenia Online adds three intelligent mobs: the Coinin Sidhe, who have rabbit ears; the Cu Sidhe, who have dog ears and tails; and the Sionnach Sidhe, who have fox ears and tails.
Meaningful Name: Word of God says that pretty much every new character in the Tarbes arc has some cheap meaning behind their name. For example all of the pixies had their names chosen for their meaning in Hanakotoba. According to the author: "So yeah, I've been on cheap name meaning bent this arc."
Meaningless Villain Victory: If Sayuri had been allowed to go through with her insane plans in the Tarbes Arc, she would have done nothing more than to attract the ire of the Crown of Tristain and plunged not only her Garden, but the entire Pixie race into an Unwinnable war with the Humans and the Fae that would have ended with the Pixies at best enslaved, at worst extinct.
The Mind Is a Plaything of the Body: The players-turned-fae seem to be slowly undergoing a mental (as well as physical) change toward their racial archetypes. Salamanders don't like cold areas, Undine react adversely to being dry, and Cait Sith seem to be developing ever more profound cat-like instincts.
Mood Whiplash: "Oh look, the cute little Djinn want to play with us, Play! Titania! Play!", and then Asuna has a Heroic BSOD.
More Dakka: Any time grapeshot or canister is used.
The Eagle unleashes a broadside into the dock, annihilating everything in its path.
Kimura quad-wielding the Eagle's swivel guns.
Mortimer's signature spell.
Shirishi's darkness bullets.
Motive Rant: Fernand has one of these in the Tarbes Arc.
Ephialtes and Sigurd also get one in the second arc.
Nice to the Waiter: Upon seeing a sign in a post office that the paper is not complimentary, Sir Dunwell reaches into his purse and pays for the sheets he took to write his dispatches without hesitation. The postmaster for that office had commented that most Reconquista soldiers who passed through didn't pay in a previous chapter.
Nightmare Fuel: Invoked. Kirito has a nightmare of Asuna, locked in the birdcage, starving to death because he didn't reach her in time.
Ninja Pirate Zombie Robot: Shiori. A trio of possibly mindlinked ninja assassin catgirls who happen to have been one (male) person.
And again in Newcastle, when trying to get to the docks faster.
Non-Action Guy: Guiche. Doesn't stop him from making two game-changing contributions.
Noodle Incident: Alluded to in Chapter nine of the second arc when Guiche is reunited with his brother. A horse was involved, of course.
Not So Stoic: Karin gets a faceful of emotional turmoil when all the fears she had been repressing over the years burst out thanks to the side effects of the mana potion.
Not Quite The Right Thing: Kirche attempts to reboot Louise from her Heroic BSOD at the end of the second arc. Only to have both of them step on each other's respective emotional wounds, causing Kirche to reveal the truth about the Transition to her in the worst possible matter in front of Koko, the worst possible person to hear it. In doing so, she only manages to push Louise even closer to the Despair Event Horizon, making her a perfect mark for Julio to manipulate into delivering herself into the Church's clutches. Though let's not forget that Karin's decision to more or less banish Louise to her basement for the rest of her life is what crashed her in the first place.
Nuclear Option: Alicia has unleashed Shiori in response to Albion's plot within Tristain! Some wonder if Albion will still be around after she's done.
Oh Crap: What happens to all of the gamers now that ALO is real. Also, to greater extent due to circumstances, Asuna when she stabs an Albion Rebel in the heart with a dagger, and he chokes for a few seconds before dying without his body disappearing.
Everyone who sees Kirito's Gleam Eyes form.
The murder of Novair gets everyone in Arrun on edge.
A noble retainer has this reactions when he realizes that his lord's plan to entrap a fae girl into indentured servitude by framing her for theft has not only been foiled, but may very well earn him the personal attention of Princess Henrietta unless he takes Leafa and Klein's oh so discreet offer to simply take back the fake silverware and let the matter drop.
Mortimer when Ryo tells everyone that Rip Jack was one of his top assassins during the debate.
Morgiana when she finally realizes that she is pregnant.
And later Mortimer and Sakuya when she tells them.
Older than They Look: Many older people playing young avatars got a chance at a second (much longer) life after the Transition.
Ontological Mystery: The players got trapped in Tristain, with no idea how they got there, who did it, if anyone, and how to return, assuming they can.
Orphanage of Love: The Fae lords set one up in Arrun for the child players whose parents didn't transition. It is especially vital to players who were "joyriding" their older sibling accounts and are now extremely Younger than They Look and face possible exploitation.
One Steve Limit: Averted, with Shouichi Saitou's granddaughter Nanami, and Nanami, Shiori's IRL little sister.
Paper-Thin Disguise: Kirito and Leafa use handkerchiefs to hide the fact they look like elves. Justified in that it only has to allow them to get to the headmaster before anyone panics (and Tabitha's authority helps significantly).
Pie in the Face: The first two slices of Eugene and Morgiana's wedding cake are quite deliberately shoved into Sakuya and Mortimer's faces.
Planning with Props: Nobody thought to return to The War Room to get the actual force tokens, so the Tristain high command had to resort to using spare change, cards, dice, silverware, and anything else they had on hand to substitute while planning out Operation Dunkirk.
Police Are Useless: Argo was able to figure out what happened to Asuna after the SAO incident shortly after she woke up and tried to alert the authorities, only to have them not even pretend to listen to her. Leading her to assemble the <<Asuna Rescue Team>> and have most of the main cast from Aincrad logged into ALO at the time of the Transition.
Poor Communication Kills: Oh so much. A lot of grief could have been avoided if the relevant parties just sat together and discussed things openly.
Mortimer hiding his knowledge of Rip Jack creates a seed of distrust between the Fae lords, and almost cripples the investigation.
The whole mess with Louise getting a BSOD, deciding to escape, and bind Cardinal could have been avoided if Karin simply opened to her daughter.
Heathcliff might have not attacked her, if Karin had simply taken time to demand the men surrender and hand over her daughter, instead of charging in.
Propaganda Machine: Since the Fae can no longer be called Elves, Reconquista's military leaders have taken to calling Faeries demon spawn and abominations merely wearing false humanoid skin, and have cited Kirito's and Morgiana's Beast Forms to support it.
She was delicate, she was exotic. Skin so pale it was almost translucent, contrasted against jet black hair that spilled down to the middle of her back. Dark golden eyes, strangely shaped but alluring nonetheless, were set into a delicate face with thin crimson lips. Her beauty was enough to make his mind forget to question the peculiarity of such a young woman carrying what seemed to be a sword strapped to her back, or the top of a metal breastplate that peaked out from the collar of her cloak.
And again after seeing her in a ballgown:
The impression of the girl was one of pure midnight. Slender arms adorned with long black gloves that terminated just short of her gorgeously bare shoulders. Slim neck adorned with black pearls. Someone had done up her hair, someone immensely skilled by the looks of it, tied up loosely in a style that was just beginning to grow in popularity. Gown of silky black, overlapped layers of fabric creating an effect that varied between totally opaque and veils of thick smoke near her feet. As a final artistic flourish, a sash tied into a giant butterfly bow had was wrapped around her waist, the overall effect proving quite fancifully endearing.
Rape Is a Special Kind of Evil: Just in case you weren't sure that Ephialtes and Sigurd weren't evil, they both openly gloat about how they are going to rape Sakuya before killing her. Ephialtes also wants to do the same to Leafa.
"Midori" has difficulty fighting at first because her new body has a different "reach" than her real one. Also, see below.
A lot of spells and effects in ALO also work differently in the "Real world" of Halkegenia. For example:
Faction Disguise. Who you scan for races that did not exist in ALO is important now. See "Midori".
Chugging ALO potions will have adverse effects. Especially on humans. For example, a Resurrection potion, and the shock to the system it causes, has just as much chance of killing a human as saving them. A note elsewhere advised not to drink more than 2 potions and it would be better if no potions are drunk at all. (And this for a batch of "mundane, common MMO" Mana potion, Haste potion, and 2 different Heal potions.)
There are now no Immortal Objects, which means destruction of terrain is now a real thing. Cue all kinds of speculation both in-story and out of it. One more or less aborted arc involves the Fairies trying to clear the Guardians using this change, by destroying their spawn points. There is at least one mage whose spells have entered Overpowered territory because of this: enemies used to be able to hide behind Immortal Objects cover...
Mobs now have intelligence. Even if most have animal-levels of instinctive intelligence this causes problems initially as the Fairies used to fixed attack patterns got themselves surprised, and later when boss monsters use their new smarts on Mob-extermination groups. Also, Pixies.
A recurring theme throughout the fic is that no virtual environment can truly emulate reality, as shown by the contrasts between the Aincrad and Pre-Transition ALfheim, and the very real world of Halkegenia. Even the death game of Akihiko Kayaba, for all of the mad genius's attention to detail, contained obvious marks to show that it wasn't real. Indeed, the fact that Kirito spent two years in SAO is what allowed him to first notice the lack of these marks in the word Post-Transtion, making him the first to suspect that they were no longer in a virtual world.
Put a bunch young people together in super model grade bodies, and they start screwing like rabbits. Unfortunately, many of them have forgotten about birth control and as a result, they Fae now have a bit of a Baby Boom on their hands. Isn't that right Eugene and Morgiana?
Recursive Fanfiction: Has spawned stories written by readers that are considered canon to the story.
Some readers in the Spacebattles threads have also written a summary/outline for an in-universe play about the source material's SAO arc.
Red Baron: Too many to list. Every mage has a runic name they are known by, and many Fae have earned various titles of their own.
Redemption Quest: Karin volunteers to take a key role in Operation Dunkirk as self-imposed penance for nominating the traitor Wardes to be head of the Griffin Knights. In addition, every single person under her command in the operation is a Griffin Knight hoping to redeem their order after their Captain's treachery.
Riding the Bomb: How the Fae guide their ship-launched bombs down to their targets in York as the opening shots of Operation Dunkirk.
Shaggy Dog Story: What SAO's Fairy Dance Arc becomes in this fic, due to the fact that all of Sugou's plans (developing a way to use Full Dive technology for mind control, "marrying" Asuna to seize control of RETCO), are all unceremoniously foiled when Louise summons ALfheim to Halkegenia.
Shipper on Deck: Duke Valliere, of all people, ships Mortimer and Sakuya due to the fact that they cover each other's weakness, politically and militaristically respectfully.
Shotgun Wedding: Sakuya and Mortimer's solution to Eugene and Morgiana's "problem".
Sneeze Cut: In Chapter 4 Part 3, after Karin asks Colbert about Lady Sakuya.
So Proud of You: King James of Albion to Wales just before sending him off, and Karin to Louise after Dunkirk.
Spanner in the Works: Reconquista's entire plans in the second arc are undone, in part, by a trio of students and a Faerie sent by the Princess to find some lost Pixies.
Stiff Upper Lip: Played with. Silica doesn't have the wit characteristic of this trope and she's not completely blase about being separated from her family again, but her experiences in SAO taught her how to keep cool in a crisis and she exhibits this behavior enough to be a calming presence on the people around her.
Stuff Blowing Up: Happens at TRIST regularly. To the point where the staff has yet to purchase any 2s for the "Number of days since last accident" signs.
The forces assaulting La Forace Prison use the heavy reinforced door as an improvised claymore.
Succession Crisis: Only five of the nine faction leaders were online at the time of the summoning, leaving the remaining races (Puca, Gnomes, Undines, and Imps) in varying states of disarray and confusion.
Suicide Mission: Operation Dunkirk. Lord Mortimer and General Gramont are working very hard to increase the odds as much as possible.
Shiori is very much aware that her mission is probably one of those. She tries hard not to think about that.
Super Toughness: All of the Fae have this to a varying degree. They are nowhere near immortal, however.
The Ice Giants and Norns of Jotunheim. Justified in that they are magically living stone and/or ice. The Beast Gods also have hard shells to protect them.
Sword and Sorcerer: Shiori's three bodies form a classic RPG trio of a Warrior, Mage and Thief.
The Bard: The entire Puca race, who provide assistance in combat using song magic.
The Men First: Botan states that if worse comes to worst, she will volunteer for the new wilting procedure to ensure it's safe before she lets any of her sisters undergo it.
There Are No Therapists: Halkegenia does not even have a concept of mental illness, other than possibly battle fatigue. Everyone else is "diagnosed as mentally defective" and locked or sent away to be forgotten. On the Fae side, no therapists are seen apart from Yui.
Things Get Real: The Fae volunteers only had minimal training (aside from their MMO days) and no actual battle experience before Operation Dunkirk.
Time Travel Tense Trouble:Skuld's narration from much of her first appearance in the 2.0 epilogue is in the conditional tense due to her not really existing the present until she loses her connection to the future.
Useless Useful Spell: In the original series, Louise's default explosions only did some non-lethal damage and destroyed the surroundings. During the Tarbes arc, she blows up a boss that required a small army to fight. With a single spell.
Villainous Breakdown: Sayuri loses it when not only she loses the leadership of the Pixies to Botan, who was against her insane plans to kill the humans who helped them against the Pixie slaver Fernand, but gets saved from being eaten by a fish by Count Arthur, the human who took care of her fellow Pixies from her home, and all of the Pixies agree with Botan to make peace with the humans and ask her to stop fighting and rest since she's suffering from Survivor Guilt.
War Arc: Basically the whole story so far, bar the Tarbes Arc.
The War Room: We see the one in Tristain royal castle. Other fortifications usually have something similar.
What the Hell, Hero?: Sakuya's response to Mortimer's plan to capture Rio in order to interrogate him for information regarding Rip Jack
Wham Episode: Chapter 10, Part 7 of the second arc Louise casting explosions, with more power and control than ever, using Fae chanting.
Mortimer postulating that Louise was the one responsible for the Transition is this for everyone in the room.
Louise absorbing the memories of SAO and ALO players.
2.0 Chapter 12 part One Heathcliff finally appears. Yui is now a Maeve.
And in part three Heathcliff and Kayaba are now separate people.
Wham Line: On the gravestone Caramella and Kino erect for the fallen faeries: "Arguile" - Hiraga Saito - Knight of Aincrad - Guild Member Knights of Blood
2.0 Chapter 11: —>Mortimer: "I purpose that Louise's summoning was successful. Her familiar is nothing less than the Cardinal System."
In the epilogue of part two: —> "I am not Human?" Louise askes, "Nay... I am An Incarnate Radius."
In of all things, the Beach Episode of 3.0 Random Djinn: "Play! Titania! Play!
Working the Same Case: In 2.0, Louise's search for missing Pixies leads her to a man that Agnes has placed under investigation due to suspected ties with Reconquista. It then turns out the man is part of a Reconquista conspiracy that is also behind the Fae murders.
Xanatos Gambit: Reconquista's plan in the second arc. Regardless of whether or not the plan to assassinate Prince Wales and kidnap Princess Henrietta succeeds, the very fact that a Faerie is involved in the plot will do MASSIVE damage to Alliance between the Fae and Tristain. And even if the Crown and the Fae move against them in a preemptive strike doing so would mean that they would lose the only chance they have to root out the Reconquista conspiracy in the Tristainian government before the war begins in earnest.
Yamato Nadeshiko: How Titania was originally written in ALO lore. She was the patron and protector of the small folk (along with roughly half of the the Fae races), and argued and fought with Oberon on their behalf as often as she supported him in his endeavours.
You Are in Command Now: When her regent Cardinal Mazarin is injured by a field boss and put out of action, Henrietta takes his place at the negotiating table with the Fae as his representative.
You Can't Go Home Again: Currently the only (using meta knowledge) way for the Fae to return to Earth is via Shaitan's Gate, but Vittorio will be extremely reluctant to loose potential new allies, so this outcome seems very unlikely. With an impending baby boom, it might be that, by the time a way becomes available, very few will want to go back anyway.