Accent Relapse: Atlas lapses into his "real" accent during moments of high stress, usually when Elizabeth has managed to defy him in a significant way.
Action Girl: Elizabeth becomes this in the second part of Burial At Sea.
The Alcatraz: Of a sorts. Fontaine's former department store which Ryan made into a makeshift prison for Fontaine's followers then sunk it to the bottom of the ocean not too far down from the main city. Turns out Fontaine himself (in his Atlas guise) is down there with it.
The Alcoholic: It's obvious that this Booker, like his counterpart, is a heavy drinker. Entering a bottle shop will prompt the clerk to comment on how often he returns, and an apparent drinking buddy complains about being left on his own that evening.
Alternate Universe: In relation to Infinite, but not the first game; despite several thematic differences, Word of God confirms that this is Rapture Prime, in its prime.
Androcles' Lion: Revealed to be the method behind Big Daddy conditioning, as well as how Songbird bonded to Elizabeth.
An Offer You Can't Refuse: Both Ryan and Atlas attempt to make one with Elizabeth, and attempt to punish her accordingly when she understandably refuses (refusing to work with Ryan, and not giving Atlas the information he wants).
Arc Words: "An ounce of X is a pound of Y" and variants in Episode Two.
Elizabeth constantly mentions "I'm here to repay a debt."
Ascended Meme: If you eat too much food from the garbage, Elizabeth will comment on it. She will either be impressed or revolted.
The Atoner: Elizabeth in Episode Two is consumed with guilt over the fact that she exploited Sally in Episode One to lure Comstock to his death. The irony certainly isn't lost on her.
In Episode 1, Shock Jockey and Old Man Winter use a prohibitively large amount of EVE, three shots each without EVE upgrades.
In Episode 2, Elizabeth being weaker than Booker makes a lot of the weapons and plasmids she has access to much riskier than the safer alternatives like the Peeping Tom plasmid and the crossbow.
In-universe, many of the features shown in Burial at Sea that weren't present in the original BioShock (drinkable plasmids, the Radar Range, and the Big Daddy's grapple drill, for example) are explained as having been deemed too impractical for mass distribution by Ryan Industries. For example, making a plasmid drinkable requires ten times the amount of ADAM. Notes regarding each feature can be found near the end of the game, around Suchong's labs.
Back Stab: The DLC adds the ability to perform sneak-kills with the Air Grabber. If you melee an unaware enemy, it's a One-Hit Kill.
Badass: Booker is still definitely one. With much less ammo and Eve this time round, you need to be to survive this incarnation of Rapture.
The Big Daddy at the end also counts. Despite Comstock managing to bring him down, beating him, the Big Daddy gets right back up then kills him. Then, in Episode Two, he kills one version of Elizabeth and is impossible to defeat in gameplay.
Bittersweet Ending: Episode Two. Elizabeth dies, but she saves Sally and is secure in the knowledge that Jack will be Fontaine's undoing, killing him and rescuing the Little Sisters. She dies with a smile on her face.
Book Ends: "La Vie En Rose" by Edith Piaf plays at the beginning of Episode Two, and over the closing credits.
Brought Down to Normal: Elizabeth loses her godhood, connection to the multiverse, and ability to open Tears at the very beginning of Episode Two due to entering a universe in which she had already died.
Bullet Catch: How the "Ironsides" Plasmid works, similar to the "Return to Sender" from the main game, but without the repulsion effect.
Call Back: A number of notable elements from the previous BioShock games, such as the Little Sisters and the "Bouncer" variant of the Big Daddy.
Remember Suchong's death, only heard via Audio Diary? In Episode Two, you get a front-row seat.
The traditional quest to go find a plasmid/vigor, Old Man Winter, just like Telekinesis, Incinerate, and Shock Jockey from the last three games.
One of the Little Sisters encountered by Elizabeth in Episode Two is none other than Masha Lutz, a minor character in the original BioShock who was forcibly taken from her parents (who subsequently committed suicide) and turned into a Little Sister. The final scene shows that she was amongst the Little Sisters ultimately rescued by Jack.
The first time Booker sees Elizabeth lockpicking or opening Tears.
And of course, the ending where "Booker" dies.
Atlas killing Elizabeth with a wrench is framed very similarly to how she whacked Booker over the head with one early in the main game.
Call Forward: Booker mentions that what Ryan does with Fontaine's building doesn't matter; "Fontaine's Dead."
Can't Hold Her Liquor: In Episode Two, Elizabeth gets drunk from a single drink, as opposed to Booker who can put down several before the effects kick in.
Cast as a Mask: In an inversion of this trope's use on the main campaign, the fact that your character is actually Comstock and not really Booker is obfuscated by the fact the VA is Booker's, not Comstock's.
Chronic Backstabbing Disorder: Atlas has a serious case of this, to the point that Elizabeth goes into their deal expecting to be betrayed. He literally never holds up his half of the bargain with Elizabeth.
Cold-Blooded Torture: One of the major scenes in Episode Two is an extended torture scene where Atlas attempts to perform a trans-orbital lobotomy on Elizabeth to obtain the location of "The Ace in the Hole". When that doesn't work out, he threatens to do it to Sally.
Continuity Nod: Some of the background audio, whether it's the music or announcements, is taken directly from the first two BioShock games. Justified in that this does take place in the same locale, though just before everything went south.
At the end of Episode Two, you get to see the creation of one of the most memorable audiodiaries from the first game.
Cool vs. Awesome: The Bouncer vs the Motorized Patriot; turns out the Patriot isn't nearly as tough. Though it makes sense, since the Daddy is more advanced and is designed to withstand the crushing pressure of the ocean floor while the Motorized Patriot is basically made of wires, gears and a simple metal frame.
Creepy Child: The Little Sisters are back in all their creepiness. This is especially true in the beginning of the game, where a large group being conditioned all turn to stare at you in unison when you get close enough. But they have nothing on Sally, a fully conditioned Little Sister who has Blank White Eyes with visible veins!
Crapsaccharine World: As with the original BioShock, Rapture was a corrupt, poorly-run mess underneath the glitz, glamor, and promise of libertarianism.
Booker: Even in a Utopia, someone needs to clean up the mess. And that's where I come in.
Cruel to Be Kind: Ryan justifies his nationalization of Fontaine Futuristics as protecting Rapture from Fontaine's destructive altruism. Of course, it rings a little hollow when he shows no empathy to the people he's suppose to be "protecting". It's just his city he's worried about.
The Cuckoolander Was Right: For all his insanity, Sander Cohen is remarkably intuitive when sizing up Booker and Elizabeth. He correctly notes there's more to Elizabeth than meets the eye, and even seems to be on to the fact that they're father and daughter. Cohen also warns Booker that he won't like where Elizabeth takes him.
Dead Person Conversation: Elizabeth converses with Booker Prime throughout Episode Two. However, Booker is pretty up front about the fact that he isn't real, being somewhere between Elizabeth's subconscious guiding her and an imaginary friend to help her cope.
Death by Irony: Although Elizabeth didn't plan out every detail, the fact she ends up luring Comstock to a toy store to die at the hands of a Big Daddy for the crime of accidentally killing her baby self is certainly serendipitous. Episode Two reveals that she knew it was going to happen that way due to her omniscience allowing her to see into the future.
Death Is a Slap on the Wrist: Played straight in Episode One, as per usual. Averted in Episode Two, which is rather atypical for the series. Elizabeth has no one to revive her, nor are there an infinite number of disposable alternate version of her, as was theorized to be the case with Booker in Infinite, so if she dies she's dead for real and you get bumped back to the last checkpoint after either a cutscene of the Luteces criticizing your failure, a snippet of the audiologs, or silence.
Death Seeker: Elizabeth. It is implied that she returned to Rapture fully aware that she would die there, and at the end of the DLC, she willingly walks to her death at the hands of Atlas.
Decoy Protagonist: Elizabeth is the protagonist of this story, not Booker. That's because this Booker is really a Comstock that survived.
Defiant to the End: Even knowing that he is about to kill her, Elizabeth laughs at Atlas and calls him names. That she knows karma is going to catch up to him probably made it easier.
Deflector Shield: The Shield upgrade is automatically acquired upon reaching the inside of the Department Store in Episode One. Elizabeth doesn't get one in Episode Two.
Diesel Punk: The Burial at Sea DLC brings our protagonists back to Rapture.
Disc One Nuke: Less than a third into Episode Two, you can acquire upgrades to the Peeping Tom plasmid that make it use up no salts as long as you stand still. Given that invisibility can make enemies literally in mid-swing completely unaware of you, it makes the rest of the game laughably easy.
Does This Remind You of Anything?: Ryan the Lion warning children that the "parasites" will share the wealth, make them eat only vegetables and give everyone the right to see an (overcrowded) doctor parodies some of the worst fears conservatives hold of leftist administrations.
Doomed by Canon: Since Burial At Sea episode 2 takes place just before the events of the first BioShock, you know Atlas is going to survive your encounter. And those who have played the first game know he's going to get what's coming to him as well. The ending also shows that Sally ultimately survives and is saved by Jack, the hero in the first game, so Elizabeth's Heroic Sacrifice isn't in vain.
The Frosty Splicers serve this role, being immune to Possession and a fair bit tougher than ordinary Splicers. The player can summon Motorized Patriots and (bizarrely) Samurai to aid them in battle.
Episode Two has Houdini Splicers as part of Ryan's shocktroopers. Besides their teleportation and fireball attacks, they have a new area-of-effect attack similar to the one used by the Firemen in Infinite.
There's also a few helmeted enemies in Episode Two that are immune to the Back Stab. Fortunately, your weapons and stun arrows work just fine, and they are mercifully rare.
Eternal Sexual Freedom: In one of the public areas, you can find two men cuddling while watching the view, without anyone reacting to them. Given the ideas Rapture was founded on, it makes some sense.
A weather eye will notice that Booker displays a set of War medals in his office. This is because he is actually another Comstock, and still justifies his actions in the war. His murder of one version of Elizabeth/Anna, and inability to face the consequences, drove him to flee Rapture, set up a detective agency, and drown his sorrows in a bottle. Unlike Booker, however, who immediately regretted losing Anna and jumped at the opportunity to rescue her, Comstock drinks to forget Sally, even though it doesn't take sharp detective skills to figure out where she ended up.
When a Splicer is attempting to have fun with killing Elizabeth, Atlas objects to torturing her and notes that they're neither animals, nor running a sports show.
Even after killing Elizabeth, Atlas honors the deal they made and lets Sally go.
When Elizabeth comes across Daisy Fitzroy arguing with the Luteces, it's revealed that the Luteces were going to make Daisy threaten the child and allow Elizabeth to kill her, therefore making her into a woman. But Daisy is absolutely against hurting Fink's child in any way, and only reluctantly goes through with the plan.
Everyone Dies: By the end of Episode 2 Booker, Elizabeth, and Comstock are permanently dead. It's strongly implied the Luteces are going to become mortal again and thus die as well.
Everything's Better with Samurai: One of the Tears allows you to summon a samurai from Feudal Japan. It's pretty tough and can usually bring down a couple Splicers before they kill it.
Evil Cannot Comprehend Good: Suchong simply could not comprehend a method of making the Big Daddies bond to the Little Sisters that wasn't based in science. He learned the hard way after Elizabeth facilitated one such bond, and the Big Daddy drilled him to a table for striking a Little Sister.
As the educational standard of Rapture was literally against empathy, it's not so surprising.
Exploding Barrels: Drums full of diesel fuel, which explode when shot at or exposed to open flame.
Eye Scream: Atlas does this as a torture technique in episode 2 in an attempt to get some information out of Elizabeth. While she manages to resist and even taunts him, he then decides to try the torture on Sally. Elizabeth breaks down and tells him what he wanted to know about "the ace in the hole" aka, about how to manipulate Jack, which turns out to be the words "would you kindly".
Face Death with Dignity: Elizabeth, who even tells Atlas that she knows what he's about to do and willingly accepts her fate.
Faux Affably Evil: Atlas, hands down. His public image is a violent revolutionary, to his closest friends he's actually a selfish crime boss, and deep down he's there to conquer Rapture, by himself if need be. At first he seems polite while asking his minion to just put Elizabeth out of her misery, but quickly degenerates into dishonorable torture and executions the more Elizabeth helps him into conquering Rapture. At the end of the game, when Elizabeth fails to give the code words to control Jack (Suchong didn't give Fontaine the code before his "death"), he threatens Elizabeth with a lobotomy, complete with actual hammering while talking about how it works, and then resorts to threatening to lobotomize Sally. And then he just kills Elizabeth anyway. It is unknown if he betrayed his close friends after getting all the pieces for Jack, but given what happened... and one of the first things that you see in Biohock 1 is one of his non-splicer mooks getting killed.
Femme Fatale/Guile Hero: Elizabeth this time around, with a dash of Anti-Hero for good measure. It even turns out her entire purpose in hiring you was to get Booker/Comstock killed.
Film Noir: The trailer makes this apparent. The game loses the Film Noir elements eventually, however. Although one Noir element is kept throughout: Elizabeth playing the Femme Fatale to a hilt in order to get Booker/Comstock killed.
There are several clues scattered throughout Episode One that Booker is actually Comstock, such as:
The game opens with Booker demonstrating an Incurable Cough of Death. At first, this seems to be the result of years of chain-smoking. It turns out to be an early indicator that he's really Comstock, whose health was compromised due to his heavy usage of the Lutece machine.
Booker's "AD" is apparently tattooed on, as opposed to a self-inflicted scar, and noticeably more fancy.
The reason Booker adapts instantly to the use of tears is that he is already subconsciously familiar with them from his time as Comstock.
Elizabeth is extremely cold and even downright rude to this version of Booker, even refusing to call him by his first name. Not only is it (in a sense) a fake identity, she happens to be terribly angry at him for killing her.
Take a look around "Mr. DeWitt's" office and you'll find rank patches and regalia from the 7th Cavalry in a glass case. The fact that this Booker still regards his service as something to be proudly displayed is a tip that he's not the protagonist we're familiar with.
Unlike the friendly ones from the main campaign, the Motorized Patriot that you can summon during the final battle with Mr. Bubbles still recites its pro-Comstock propaganda phrases and has Columbian flags — a subtle hint as to who you're actually playing as.
Booker introduces himself to Sander Cohen as Booker DeWitt. Cohen replies: "Is that right...?" It isn't.
The fact that Elizabeth isn't familiar at all with Rapture.
Elizabeth calls the Air Grabber a Sky-Hook, and Booker gets a tear nosebleed.
Towards the end "Booker" has flashes of his face being brought to bowl full of water, first-person view of how actual Booker killed Comstock in Infinity Prime.
Elizabeth's nightmare at the beginning of Episode Two foreshadows the entire conclusion. As she chases Sally down the street, a flurry of playing cards passes in front of her, one of which is the Ace of Spades, AKA the Death Card. She then sees a sign advertising trans-orbital lobotomies, followed by a scale model of her tower, complete with angel wings and Elizabeth's face, near a shop selling wrenches. This is implied to be her subconscious using symbolism to foretell the events near the end, when Atlas tries to get Elizabeth to reveal the location of the "Ace in the Hole" by threatening her, then Sally, with a trans-orbital lobotomy. Shortly before this, he tells one of his men that "she's no good to us with a halo and wings," and at the very end he kills her with a wrench.
The conversation the Luteces have with Daisy Fitzroy when Elizabeth is eavesdropping on them also applies to Elizabeth's final act. The end result—Bioshock 1—was more important to her than her survival, much like Daisy's revolution was to Daisy.
Functional Addict: Ryan's stormtroopers are clearly Splicers, but other than the facial deformation they talk and behave like perfectly sane (if rather ruthless) police officers. This makes sense, as Ryan is hyper-competent and rich enough to either only hire Splicers that are still largely sane, or to keep his Splicers supplied with sufficient Adam to stave off the worse aspects of mental degeneration.
Game-Breaking Bug: Sometimes when you cycle the airlock (a disguised loading section) the doors will refuse to open and you'll be stuck there until you restart from your last save. Annoying, but not game breaking, unless it's combined with a somewhat rarer bug that stops the game from autosaving forcing a complete restart.
Gatling Good: The turrets. There is also a Gun Automaton from Columbia that can be summoned into the Bistro.
Gameplay-wise, the survival horror elements of BioShock are back in force versus the fast paced gunplay of the main campaign. Due to the Splicers tearing apart, or already using everything in the department store, resource conservation is a must as ammo and health are scarce. Episode Two takes this one step further and is essentially a stealth game.
In terms of art direction, the aforementioned shift to from a Two Fisted Tale to Film Noir, though the Noir elements get mostly dropped once they reach the department store.
Geo Effects: In Episode Two, certain parts of the environment affect Elizabeth's stealth. Walking through glass shards creates noise which pretty much every Splicer nearby will hear, while walking in water makes splashing sounds and ripples which will alert enemies nearby. The Peeping Tom invisibility cancels both of these.
The Hero Dies: Comstock dies in Episode One (though "hero" is putting it loosely by that point), and Elizabeth dies in Episode Two.
Heroic Sacrifice: One of the running themes in Episode Two. Daisy pretended to be a psycho to goad Elizabeth into killing her, because Elizabeth needed to have blood on her hands to be strong enough to kill Comstock. Elizabeth ultimately sacrifices her own life so that Sally and the other Little Sisters can be rescued by Jack and lead a normal life on the surface.
History Repeats: The Rapture version of Booker lost his (adopted) daughter to gambling/kidnapping just like Booker Prime. Doubly so when we learn he's actually a version of Comstock and how events happened in his version of history.
Elizabeth fears this happening in Episode Two, lamenting that her sins and mistakes are ironically just the same as Booker and Comstock's, wondering if perhaps that it isIn the Blood after all.
In a roundabout way, the wrench that Atlas uses to kill Elizabeth at the end of Episode Two is one of the weapons involved in his ultimate death from his "ace in the hole".
Honor Before Reason: The whole point of the trip to Rapture was just to eliminate the Comstock and get out. However Elizabeth refuses to leave Sally behind and even sacrifices her powers and strands herself in that dimension to protect her (which is even lampshaded by the Luteces and "Booker" himself how foolhardy this is). Ultimately she causes the events of the first game and the downfall of Ryan and Fontaine.
Hopeless Boss Fight: The Bouncer Big Daddy in Episode Two is unbeatable. The trick is just to avoid it or, failing that, get the other Splicers to draw its attention so you can run.
Hope Spot: Downplayed. In Episode Two, you can come across a poster for the Hypnotize Big Daddy Plasmid. The caption? "Coming next year."
An Ice Person: Frosty Splicers, who have been drinking Old Man Winter Plasmid bit too much. They have ice crystals protruding from their bodies and a "Santa Claus" style beard. They even shoot balls of ice from their fingertips.
Ice Breaker: Attacking an enemy under the effects of Old Man Winter will shatter them.
I Die Free: For literally her entire life, people have been trying to exploit Elizabeth and her abilities for their own gain, and finding their own ruin in the process. Comstock wanted her to take up his mantle and burn the "Sodom Below," Songbird worked tirelessly to keep her locked up, and even Booker sought to use her to get out of his gambling debts before eventually realizing his error. In this game, Andrew Ryan attempts to press her into his employment and Atlas tortures her to get her to give him the location of the Ace in the Hole. But in the end, she dies having set in motion the events that would bring Jack to Rapture and set Sally free, a destiny that she decided for herself.
Imaginary Friend: Booker in Episode Two. Turns out its just residue from Elizabeth's fading powers trying to help her through the situation (he even flat out tells her as such at one point). Though oddly her "conversations" with him are done as if it's through a radio communication.
Immune to Bullets: The Ironsides Vigor in Episode Two allows Elizabeth to absorb incoming fire, refilling her own ammunition. An upgrade also heals you and refills your EVE based on the damage of the attack.
Impaled with Extreme Prejudice: Comstock gets this thanks to the Big Daddy's drill. In Episode Two, one version of Elizabeth is found impaled on some rebar after getting knocked around by the same Big Daddy. Finally, we get to see Suchong's death in all its karmic glory.
Imported Alien Phlebotinum: Zig-zagged. While Fink did base the development of Columbia's Vigors on Plasmids, it's revealed that Dr. Suchong stole back Fink's work upon discovering the Tears to further improve his own Plasmid research. He even calls the whole thing an intellectual property theft two-way street. Eventually, it's revealed in Episode Two that they even collaborated on the development of Songbird and the Big Daddies.
Incest Subtext: Elizabeth plays the role of the Femme Fatale to the hilt, but it's clear she's not enjoying it, and it later becomes very clear she's not doing so for lust or love. She needs to kill this version of Comstock, and finish the job that she and Booker started in the finale of BioShock Infinite, in order for the both of them to live a normal life. She may possibly need to help Sally as well, although by the time you reach the end of Episode One, it's clear she has yet another motive: revenge.
Also, the whole dance scene. To quote Elizabeth, "I shudder to think what else he could ask."
The Luteces, again. You'd think that getting killed and having their quantum signatures smashed across probability space would disable their biological clocks. One of Rosalind's Voxophone recordings weighs the cost of being normal to the cost of being an unkillable abomination and able to, or pretty much forced to, unlock the mysteries of the universe. Robert talks about kids.
Infant Immortality: Averted. Rapture Booker is a version of Comstock who accidentally caused his Elizabeth to be decapitated when the Tear closed during the kidnap attempt, instead of severing just her little finger like Elizabeth Prime. Barely played straight with Sally, who Elizabeth left to die - up until the guilt is too much and she returns.
Instant Sedation: The crossbow tranq darts drop whoever they hit instantly. The gas darts take a few seconds on account of being gas, but otherwise are just as effective.
Also the backstab move on the unaware—it actually knocks them out, and if you stay by their prone forms you can even hear them snoring.
Interchangeable Antimatter Keys: Just like the main game, lockpicks are single use and some locks require multiple picks even though this makes no sense, especially for someone as skilled at lockpicking as Elizabeth. The alternative wouldn't be much of a challenge, though. Fortunately, you can buy more at the vending machines and you don't need to open every lock.
Invisibility: The Peeping Tom Plasmid in Episode Two lets Elizabeth turn invisible by holding down the plasmid button. While invisible, any sound she makes is also muffled, though attacking will break it.
Jack Bauer Interrogation Technique: Implied; Booker knows Suchong didn't take Sally because he had the man strapped to a chair for fifteen hours. It turns out Sally was taken for the Little Sister program, except it was Cohen who passed her along.
With Episode Two comes the incredibly uncomfortable and hard-to-watch trans-orbital lobotomy scene, in which Atlas nearly performs amateur brain surgery on Elizabeth. No further description is necessary. If you've played it, you'll know exactly what is meant by this. Made even worse by the fact that Elizabeth wasn't lying when she said she didn't know what the "ace in the hole" was.
Jerk with a Heart of Jerk: After Fontaine's empire collapsed, Cohen took stewardship of the orphans in Rapture. Then it's revealed he only took the orphans in the first place because he was paid, and to make a profit on selling them. The ones he couldn't, he had sent to Fontaine's Department Store where all the renegade splicers were held. True to form, he is actually offended that anyone would criticize this "act of charity."
Jump Scare: Watch Sander Cohen's Kinetoscope movie in Episode Two. The ending will surprise you.
Just Before the End: The DLC is set in Rapture before things went from idyllic to nightmarish. To drive it home further, it's set on New Year's Eve, the day when "Atlas" and his army performed their raid and kick-started the civil war in the city.
Kick the Dog: A very large amount of Episode Two is devoted to showing just how much of an absolute monster Atlas is.
Kick the Son of a Bitch: In one of the closing Episode Two scenes, Suchong slaps a Little Sister demanding his attention; unbeknownst to him, she very recently managed to bond with a Big Daddy, resulting in his very grisly death.
Kung-Fu Proof Mook: Frosty Splicers are immune to Possession. In Episode Two, the mooks with heavy metal helmets are immune to the Back Stab.
Leonine Contract: Ideal sexual congress apparently works this way in Rapture, with both parties advised to outline the terms of their impending relationship in writing (no oral agreements or handshakes), but still strive to be as selfish a lover as possible.
Limited Loadout: In Episode Two, Elizabeth only gets four guns and very limited ammo for them. Only the Radar Range keeps its ammo supply from the previous episode, probably as a concession since it's an ammo hog.
Literally Shattered Lives: Shattering enemies frozen by Old Man Winter. You won't be able to loot them if you off them this way, though.
Lockpicking Minigame: In Part 2, picking locks always consumes a certain number of lockpicks (which you have to find or purchase from vending machines) and requires timing. You are shown the six color-coded pins inside the lock: white ones open it, blue ones give you a bonus item, and red ones raise the alarm. The pick moves back and forth across them continuously, and you have to press a button just as it's under the correct pin to set it.
Lost Forever: Unlike the main game, you can't buy new Plasmids, only find them. You start with Possession and Devil's Kiss, earning Old Man Winter along the way. Shock Jockey is fairly easy to find, though optional. Bucking Bronco, however, is located in only one spot and easy to miss if you aren't paying close attention. However, since you don't find it until after the final checkpoint save, it's not a huge deal.
In Episode Two, the upgrades for vigors cannot be purchased (i.e. they're a special pickup item hidden around the episode), meaning passing a Point of No Return renders them this. Special mention for the Ironsides Vigornote A passive alternative to "Return to Sender" from the main game — ammo hits are absorbed, but are added into inventory instead of building into a thrown projectile. which cannot be obtained if you miss it.
Mad Artist: Cohen shocks two people dancing because they're not giving him the artistic vibe he wants.
Meaningful Background Event: If you look closely in the background just after leaving the office, you'll see a Big Daddy shooting his drill to the top of a building like a grappling hook and swinging away like Spider-Man. That same Big Daddy is later seen repairing a billboard advertising Fontaine's Little Sister orphanage, which appears to be closed by the Council. And Elizabeth says this when the elevator passes the billboard:
Elizabeth: This nation values children, not childhood. There's a profit to be made, and men who make it.
Meaningful Name: Elizabeth's Title Drop indicates that "Burial at Sea" refers to the fact that Ryan rounded up all of Fontaine's people, put them inside Fontaine's department store, and then sunk the store to the bottom of the ocean trench that Rapture is built over. It also refers to Elizabeth bringing Booker/Comstock to said department store so he can die there, a fact reinforced by the "Burial at Sea" achievement occurring at the moment of Comstock's death. It also refers to Elizabeth's death, which similarly has an achievement appear to reinforce this concept.
The results also give meaning to Comstock's catchphrase for Elizabeth. In the case where only a pinkie was lost, Comstock kept viewing the possibilities using the Lutece device. He arranged the death of the Luteces, was certain Booker would lead her astray, warned Booker that time would flow backward before he could find absolution, had murals of the major events of the game including his own death, and especially was certain that "The Seed of the Prophet shall sit the Throne and drown in flame the mountains of Man." If the "Sodom Below" spoken of was Rapture (which had as its own catchphrase "No Kings Or Gods—Only Man"), then Elizabeth did exactly what he foresaw when she took her destiny into her own hands and triggered the Rapture Civil War in the process.
Mini-Game: Elizabeth's lockpicking skill is represented as a simple "stop the needle" minigame, quite similar to the one from BioShock 2. White unlocks the lock, blue unlocks it and drops a noisemaker, and red triggers an alarm.
Missed Him by That Much: During Elizabeth's trip back to Columbia, she gets on an elevator. She passes by her younger self and Booker, who were preoccupied with a message from Daisy Fitzroy to look back and notice her. Justified, as she informs Booker that she can't run into her younger self this time because she didn't last time.
When you exit the first elevator, you're greeted by a waiter who uses the Houdini teleportation to bounce around the room making sure people are taken care of. Because walking would just be too inefficient.
Also when Booker uses the Devil's Kiss plasmid to light a cigarette.
The Radar Range, a powerful Ray Gun-type weapon, is good for toasting Splicers... and turkey, apparently.
The first plasmid Elizabeth finds, Peeping Tom, allows her to turn invisible and see through walls. It was designed to let men be perverts.
My Death Is Only The Beginning: Heroic example. Elizabeth chooses to return to Rapture without her powers, knowing this will result in her death at the hands of Atlas, but also that it will eventually lead to her goal of saving Sally and the other Little Sisters being accomplished by Jack.
Mythology Gag: The main game's Arc Words were "Bring us the girl, and wipe away the debt." What does Elizabeth say her occupational field is in? Debt collection, of course. And the achievement for completing Episode Two is called "Paid in Full".
In the end, Booker (really Comstock) tries to pull Sally out of her hole and gets drilled by the Big Daddy in the same manner as the man in the first BioShock trailer.
Remember the wrench in the first game, which made a cameo in Infinite? Pops up in a slightly bigger role here as well.
Remember how Eleanor has her father figure in her head? Now, so does Elizabeth.
The Kashmir Restaurant and the Adonis Luxury Resort, the first areas you see in BioShock 1 & 2, are one of Atlas' possible targets. You can also see "Sinclair Solutions" on some makeup tins.
Some people also claim to see a split-second flash of Delta through a tear.
In Suchong's clinic, you can find notes regarding the Vita-Chambers from the first game. It turns out they work via a combination of plasmids and "quantum entanglement," which (while mentioned in the first game) now means that they bring back an alternate universe version of whomever they revive (which is implied to be how Booker keeps coming back to life when he's separate from Elizabeth in Infinite). This ties the pseudo-sciences of the original game and Infinite together.
The Carbine is changed from single-shot to a less accurate three-round burst, like the Burstgun from the main campaign.
To emphasize the stealth aspect of Episode Two, the shotgun and hand cannon get a huge nerf to their firing rates, nor is Elizabeth as competent in cycling and reloading them. The shotgun's clip size is also cut in half. Elizabeth herself is much less resistant to damage than Booker, and doesn't receive a shield, gear, or Infusions at all. Finally, Elizabeth can't do any damage with a melee attack unless it's a Back Stab; it only stuns the target and allows her to hide or shoot them with something else.
Nice Job Breaking It, Hero: Both Booker and Elizabeth inadvertently help out in bringing about the civil war that tears Rapture apart. Not that Ryan wasn't already doing that himself, they just sped up the process.
Elizabeth: We'd all be better off, us DeWitts, if we could leave well enough alone.
No Canon for the Wicked: Played with, in an odd fashion. While the nature of the BioShock Multiverse means all choices are canon, it's Elizabeth's actions that cause the good ending of ''BioShock to even exist:
ElizabethI can see behind all the doors... and behind one of them, incredibly, I see him.
Comstock thinks he's killed the Big Daddy. He hasn't.
You're forced to do this a lot as Elizabeth in Episode 2 of Burial at Sea. Fortunately enemies you knock out or tranquilize are counted as "killed", meaning you can loot them, and though they're not technically dead (you can even hear them snoring if you crouch near them), they won't get back up either. That said, there are instances of Respawning Enemies, so be cautious of just running over that broken glass or puddle, lest you alert the new enemies to your presence.
Nothing Is Scarier / Jump Scare: Right after the Sander Cohen's Kinetoscope movie in Episode Two ends, a man in one of Cohen's rabbit masks is seated directly behind you, raised up from a trap door. But he doesn't try to fight, nor does he react to your actions taken against him. He just sits there. Watching. Waiting. Even worse? That isn't a man. That's one of Cohen's plaster statues. So, it still might be a man, frozen in plaster.
Obviously Evil: Elizabeth is able to peg Atlas as a psychopath within minutes of first meeting him. Granted, she's got a lot of experience in that regard, and he didn't exactly try to hide it.
Off with His Head!: This iteration of Booker pulled a little bit harder than the main one, managing to drag his daughter back as the Tear closed. Unfortunately, it closed just a bit too soon.
One Steve Limit: Averted. Sally happens to share her name with the risque poster of a pin-up girl you "rescue" in the main game.
Only Six Faces: The number of different NPC models is very limited; this is especially noticeable in the opening "peaceful" areas, which are relatively densely populated.
Pacifist Run: It's possible to go through the entire second episode without killing anybody, provided you only use the knockout crossbow bolts and melee-attack enemies by sneaking up from behind. Harder-than-Hard 1998 Mode doesn't allow you to pick up guns, enforcing this trope.
The Password Is Always Swordfish: Though Suchong's encoding is indecipherable to the layman, Elizabeth's knowledge of chemistry and experience with code-breaking allow her to discover the basic structure pretty quickly. The only thing missing is the cipher itself, but that is right on the paper: "Suchong". Suchong also uses his birthday as the code for his lab in the department store. Elizabeth lampshades how his ego is his undoing.
Pink Mist: Concentrated fire by the Radar Range causes the target's entire body to blow up into this with enough force to kill enemies around them. There's an achievement for doing just this to 15 foes.
The Pirates Who Don't Do Anything: Booker DeWitt is now a Private investigator rather than a Pinkerton detective. He shows no detective skills in the game and spends most of the game shooting up splicers like he would have in Infinite.
Politically Correct History: Rapture is racially integrated and openly accepts homosexuality, transexualism, and pornography in 1958 (although this is not to say certain period appropriate prejudices don't exist). Justified in that Rapture is an individualist utopia that was created in part to escape from the social injustices of the mid-20th century.
Portal Cut: The nasty problems that can occur when messing with portals comes up again. And this time with a Gory Discretion Shot when instead of a finger, the fight over baby Anna in this universe resulted in all but her head staying on Booker's side. This horrible accident causes Comstock's breakdown.
Propaganda Machine: Similarly to the "Voice of the Prophet" Kinetoscopes, the "Need to Know Theater" films are little more than thinly-veiled promotions of Andrew Ryan. The nurseries in Rapture also teach stories about "Ryan the Lion" triumphing over "Peter the Parasite" in order to indoctrinate children into following his philosophy.
Protagonist-Centered Morality: Played straight in Episode Onein order to be fully deconstructed in Episode Two. Elizabeth uses Comstock's grief at the loss of his adopted child in order to bait him into a dangerous situation. Once he finds out that she's been turned into a Little Sister, Elizabeth does nothing to rescue the child from being stuck in the piping-hot vent in order to insult Comstock, who is subsequently killed by the Big Daddy. This is all ignoring the fact that she exploited and hurt a child in order to accomplish her goal, which is Not So Different from the real Comstock. She eventually comes to realize this and is horrified at the thought of her own actions, causing her to have a terrible nightmare, leading her to return to Rapture while the Luteces give her a What the Hell, Hero? speech.
Public Domain Soundtrack: Chopin's Nocturne Op. 9, No. 2 shows up again, this time given a twinkling, childlike remix for the toys section of Fontaine's department store.
Tchaikovsky's Waltz Of The Flowers returns, this time a piano cover as Booker and Elizabeth go to see Sander Cohen.
Pyrrhic Villainy: Atlas may finally have his "ace in the hole", but as Elizabeth and the audience knows, this will eventually lead to his downfall in the first game.
Ray Gun: The Radar Range. Never has a microwave-oven substitute gotten this close to being one.
Booker: Never figured out if the thing is supposed to cook a turkey or a Splicer.
Reflecting Laser: Well, lightning. A new upgrade to Shock Jockey gives a chance to make lightning bounce off a surface towards an enemy if the player happens to miss. Given how costly each shot is, this is a worthwhile upgrade to have.
Rejected Apology: Booker, the alternate version of Comstock that fled to Rapture, tells Elizabeth that he is sorry for what happened. Elizabeth tells him that he's not sorry, but he soon will be... just before he is impaled through the chest by a Big Daddy.
Retraux: The Fact from Myth trailer, which like the Truth from Legend ones is presented as an early 1980s documentary, though set in the Rapture timeline. It also features a woman living in upstate New York who may or may not be Sally.
Revenge: Elizabeth's secondary motivation this go around. She wants Comstock to pay for what he did to an alternate version of her. Doubly motivated by the fact that Elizabeth, after leaving Infinite's Booker at his baptism, had previously attempted to stop this version of Comstock from kidnapping a baby version of her, as revealed in Booker's flashback at the end of Episode One.
Revision: Daisy Fitzroy was instructed to try to kill Jeremiah Fink's son by the Luteces. She actually objected to this at first, claiming that his son wasn't to be held accountable for his father's actions, but she agreed to go through with it so that Elizabeth's resolve to stop Comstock would be strengthened. The only reason we assumed she had been Jumping Off the Slippery Slope is because, justifiably, she didn't tell Booker and Elizabeth.
Rocket Tag Gameplay: Even more than the main campaign, due to the fact that fights tend to be against smaller groups, Booker can't hold much ammo, and he can't take as many hits. Taken Up to Eleven in Episode 2, where Elizabeth has no shield, a pittance of health, and extremely slow weapons with no upgrades. On the other hand, she has the three highest damage weapons in the game, save the RPG and sniper rifle, and much better stealth options.
Rule 34: In-universe: Were you aware there was such a thing as Big Daddy pornography in Rapture? Well...
Luckily, it does not show what they actually look like under the suit. A porn actor just plays one.
Scenery Porn: In its prime, Rapture truly was a beautiful city.
The first few minutes of Episode Two's Paris.
Scenic Tour Level: Much like the base game, it's a pretty long one in Episode One, comprising the first third of the game. Episode Two also has one, though comparatively shorter.
Self Cest: Taken to ridiculous extremes in Episode Two where a voxophone reveals the Luteces are considering having children.
Sequel Difficulty Spike: In Episode 1, ammo and money are harder to find, upgrades are fewer, and the shield is much less effective than in the main campaign. However, prices have been reduced accordingly, the Hyperspace Arsenal is back, and Possession is a whole lot more useful. Episode 2 is even worse, as Elizabeth is weaker and has fewer weapons than Booker, but this is balanaced out by her being a lot better at stealth than him.
Sexy Walk: Elizabeth does this when she first enters Booker's office.
Shmuck Bait: The audio diary you find in Jack's bedroom. It should be obvious what it contains before you hear it. You'll probably listen to it anyway, on the off chance that it's something new.
Shock and Awe: Aside from the Shock Jockey Plasmid, Cohen shocks the crap out of his dancers with electric cables if they fail to keep the mood.
Shoot the Shaggy Dog: Atlas almost causes this to happen; once Elizabeth has retrieved The Ace in the Hole, Atlas hits her with the Wrench to kill her. He then finds out that, while this is indeed The Ace, it's encoded in a code he cannot read. But Elizabeth has just survived and tells him that it says... Would You Kindly.
Shout-Out: Burial at Sea 2 features a 1998 mode that emphasizes stealth, and the promotional post had Elizabeth in a cloak and a crossbow. Thief was released in 1998, and features a cloaked man on its cover with a bow and arrow. Adding to this, Andrew Ryan repeatedly calls Elizabeth this when she returns from Columbia.
A dreamy, sunny day at Paris, at a cafe, that turns into a nightmarish maze as La Vie en Rose plays? Wake up, Elizabeth.
There's a little girl named Cosette in Paris, which is also a Continuity Nod to the main campaign, where Elizabeth mentions Les Miserables when she talks about the Vox Populi.
Elizabeth chasing a child chasing a bright red balloon that sticks out through the streets of Paris at the beginning of Episode Two is a reference to The Red Balloon.
You can pick up an audio diary by Rosalind explaining that she will die for real if she returns to the original dimension she died in. It's named "The Lazarus Project", and it doesn't refer to anything else in the text - but Rosalind's voice actor voiced another woman who was resurrected by a Lazarus Project.
Shown Their Work: The cipher Suchong uses, that Elizabeth decodes various instances of throughout Episode Two, is real.
Slashed Throat: Melee executions can now do this in addition to decapitation and other gory methods of killing.
The Sociopath: It's made very clear over the course of Episode Two that Atlas is this.
Spread Shot: Frosty Splicers can shoot five spreading ice projectiles out of their hands.
Stable Time Loop: It's implied that the entire reason Elizabeth sent herself to Rapture while she was still omnipotent, knowing full well what would happen to her, is because her still-omnipotent self realized she had to die if certain major events in Rapture - notably helping the Big Daddies bond with the Little Sisters and giving Atlas the Trigger Phrase for Jack - to happen, which would eventually lead to both Andrew Ryan and Atlas' downfall, and the long-term salvation of the Little Sisters.
Stealth-Based Game: Most of Episode Two revolves around this, as it's obvious Elizabeth isn't trained for combat. She takes hits harder than Booker, ammo and health are very scarce, and while she can get Plasmids, very few are made for direct combat. Her melee attack doesn't even do any damage at all unless the enemy is unaware. The best approach is to sneak around and knock out people when they're not looking and use hit-and-run tactics.
Stun Gun: Elizabeth's crossbow uses non-lethal ammunition, either in sedative or knock-out gas variety. It can also fire noisemakers for a distraction.
Summon Bigger Fish: After discovering that Sally has become a Little Sister when trying to force her out of the vent, Sally lets out a cry that summons a Bouncer to come to her aid.
The Plasmids used by the Splicers are the original versions, not the derivative versions produced and sold by Ryan Industries. As a result, the Splicers are considerably tougher than in 1 and 2.
The Big Daddy that you encounter multiple times throughout both episodes has the ability to fire its drill at you, which the Big Daddies in the first game lacked. It does lose said drill when it gets stuck in Suchong, though. It's eventually given a Hand Wave in the form of a note that says that the gas used to propel the weapon damaged the psyche of the Big Daddy, as well as the wires being fragile.
Thanatos Gambit: In Episode Two of Burial at Sea, Elizabeth willingly sacrifices herself to trick Atlas into bringing Jack to Rapture, dying content in the knowledge that she'd brought about his eventual downfall and that Sally and all the other Little Sisters would finally be free.
Teleporting Keycard Squad: Any time you complete some portion of the main level, expect more Splicers to have crawled out of the woodwork to make your life difficult.
Terrified of Germs: One audio diary you come across is a recording of a woman who couldn't help but worry about all the bacteria a man might have in his saliva and if he had brushed his teeth while he kissed her. Such behavior is common to ADAM users.
The Stinger: A post-credits scene depicts Jack's plane sinking into Rapture.
Time Skip: Elizabeth is unintentionally drugged into unconsciousness for two weeks in Episode Two. Bringing her from just before the revolution to it being in full-swing.
Title Drop: When Booker and Elizabeth reach Fontaine's former store sunken at the bottom of the ocean. The latter can't help but muse about Ryan's polices on sending Fontaine's followers down there with it.
Elizabeth: It takes a cold son of bitch to do that to a living person. Booker: What's that? Elizabeth: Burial at sea. Booker: You read your residency contract with Ryan Industries? "In perpetuity". We're all buried at sea.
Tomato in the Mirror: In Episode One: You may call yourself Booker DeWitt now, and even speak with his voice, but you've really been playing as Father Comstock the entire time. Kind of explains why Elizabeth wouldn't call you "Booker", doesn't it?
Tomato Surprise: In Episode Two: It turns out the plot is not just a parallel universe, but the one where the events of Bishock unfold, making both episodes a prequel.
Too Awesome to Use: In episode 2, your weapons and ammunition are limited, and attempting to melee enemies who are alerted to your presence just pushes them down (justified in-universe as Elizabeth not being as strong as Booker to outright kill them). On top of that, Elizabeth doesn't have access to shields like Booker, and has much lower health, meaning she can't take that many hits. This forces you to rely more on stealth and sneak attacks rather than going in guns blazing like Booker can. As a result, some players may be hesitant to ever really put said weapons to much use even when there's a room full of enemies that you could blast away.
Too Dumb to Live: Comstock doesn't even turn around before he gets impaled by the Bouncer Drill, even if said Bouncer's footsteps are clearly audible.
Took a Level in Badass: Elizabeth goes from being your non-action backup to knocking out Splicers and using guns in Episode Two. It's out of necessity, though, and Elizabeth isn't as badass as her father.
Took a Level in Jerkass: Elizabeth is much ruder to this version of Booker than she was in the main campaign. Turns out it's because this Booker is actually an alternate version of Comstock, who had the Luteces scrub his memory and send him to Rapture rather than face the guilt of causing the death of Anna in his reality.
Trap Is the Only Option: Elizabeth knows Atlas won't stick to his end of the deal, but she doesn't have any other option but to go along with his demands and hope he slips up somewhere. This being Fontaine, it does not go well for Elizabeth.
Troll: The entirety of Episode One turns out to be one long ploy by Elizabeth to mess with Booker/Comstock solely to punish him for the accidental death of her counterpart, what he would have done if he'd succeeded, as well as failing to learn from his mistakes despite claiming he came to Rapture to atone.
Episode Two reveals that Elizabeth returned to Rapture due to overwhelming guilt because of this. She even is remorseful for what she did to Comstock, saying that while he at least tried to help Sally, she used Sally to emotionally manipulate him, making her Not So Different from him.
The Luteces appear at the end of Episode One with absolutely no foreshadowing.
The Reveal that the Player Character in Episode One was actually Comstock rather than Booker shocked many fans who believed Comstock no longer existed after the events of the main game.
Daisy Fitzroy's appearance in Episode Two caught plenty of players off-guard.
The return to Columbia was a bit of a surprise too, at least to those who didn't read the achievement descriptions ahead of time.
Unexpected Gameplay Change: Burial at Sea: Episode Two is fundamentally a stealth game, and while "guns blazing" is still an option, it's a much less viable one. Elizabeth doesn't have a regenerating shield like Booker, she has much smaller health and only one life,note Unlike Booker, death means you're instantly kicked back a checkpoint. and she has a severely reduced ammo supply; however, she can still one-hit-melee unaware enemies, can pick her own locks, has access to a crossbow with darts, and can carry up to five medkits.
The ending to Episode One. Everything after the Big Daddy fight. This incarnation of Booker is revealed to be a Comstock who, after the attempt to get his Booker's Anna went horribly wrong, had the Luteces send him to Rapture so that he could forget. And then Comstock is killed by a Big Daddy.
Episode Two doesn't disappoint, either. Elizabeth gives up her omnipotence to try saving Sally. As a result, Sally lives but Elizabeth dies; however, she finds solace in the fact that Fontaine's not going to get to enjoy his victory for much longer, since Jack will take up her sword and destroy Fontaine, then save Sally and the other Little Sisters.
Your Princess Is in Another Castle: The Columbia segment in Episode Two opens with a suspiciously easy fetch quest for an item one uneventful elevator ride from the start point. When you try to go back, however, Suchong pops in to force you into performing a longer, far more dangerous fetch quest for an unrelated item.