Super Dangan Ronpa 2: Good Bye Academy of Despair is the sequel to Dangan Ronpa, released in 2012.Much like its predecessor, the game begins with a new student starting their first day at Hope's Peak Academy, an elite private school that only accepts the best of the best of the best, no matter how eclectic their field. Hajime Hinata, the new guy, has always admired the school and is eagerly looking forward to attending... that is, until he arrives at the school for his first day and suddenly falls unconscious.When he wakes up, Hinata finds himself trapped in a classroom with fifteen other new "Super High-School Level" students. They are greeted by a strange rabbit-like doll called "Usami", who promptly announces that they'll be going on a field trip. With a wave of her wand, the walls to the classroom fall apart to reveal that they have all been stranded on the tropical resort island of Jabberwock. Under Usami's instructions, the students must bond with each other to gain the "Fragments of Hope" needed to leave the island.All of this is sadly for naught when Monokuma suddenly shows up and violently usurps control of the island from Usami. He then reinstates the same "School Life of Mutual Killing" rules from the first game, meaning that the only way off the island is for one of the students to commit a perfect murder and sacrifice the other students so that they alone can leave. While the flow of the game remains largely unchanged, the dynamics of certain mini-games have been drastically changed and new ones have been added to the mix as well: for example, some segments of Non-Stop Debate task you with finding the right statement to agree with, and other classmates can now interrupt you with an objection.After completing the game, an alternate story called Dangan Island is unlocked where Usami strikes first against Monokuma when he appears and manages to beat him as a result, preventing him from taking over. The field trip goes exactly as planned, giving you plenty of time to bond with your fellow classmates in peace.Like with the previous game, a translated Let's Play of the game is underway at the Something Awful forums, alongside Dangan Ronpa Zero. A mirror of the thread is available here.note Note that the mirror copies the actual content of the thread and not Something Awful's profanity filter, so if you don't have an account with SA you might prefer the mirror.. Sadly, the Let's Play has been cancelled as of July 13th, 2014. However, other translation efforts can be found here and here which consecutively make up the entirety of the main story. This page links to translations of this game as well as other works in the franchise.There is a wikia page for the game here that contains a complete summary of the game, including unmarked spoilers.Be warned that all spoilers below are unmarked. It's virtually impossible to list tropes for this game without spoiling everything or creating Self Fulfilling Spoilers, just like its predecessor.NIS America has confirmed a localized version to be released on September 2nd, 2014.
Used to corner the first culprit. Hanamura claims to have been in the dining room with the others, but made no mention of Tsumiki tripping. This being Hanamura, the fact that he can't recall it is very suspicious indeed, combined with the fact that his voice was heard during the blackout...
Also used in the fourth trial. The murderer dropped a hammer at the crime scene to make it appear to be the murder weapon, but the fact that it doesn't have any oil on it proves that the murder weapon must have been something else.
Used in a somewhat roundabout way in the fifth trial, as well, where the cause of death is suspiciously absent from the Monokuma File. An element absent from the Monokuma File was pivotal to the last two cases, so Hinata realizes the case must be more complicated than it first appears — and indeed, it is.
Amnesiac Hero: Hinata, who's most upset by the fact he can't even remember his talent. It's eventually revealed that he does not have one, since he's one of the reserve course students.
Anguished Declaration of Love: Kuzuryuu's plea to Pekoyama at the end of Chapter 2's trial, declaring that he needs her as a person rather than as a tool, could be interpreted as this.
Anyone Can Die: It's more a matter of when, and guessing who the final group of survivors are. There is a glimmer of hope that they can still be revived, though.
Artificial Intelligence: Monokuma and Usami/Monomi are actually this. Also the case with Nanami, Alter Ego, and Junko Enoshima.
Amnesiac Dissonance: Between the surviving students' current personalities and their previous identity as Ultimate Despair. Hinata in particular is horrified to learn of his conversion from Hajime Hinata to Izuru Kamukura.
Asshole Victim: In Twilight Syndrome Murder Mystery, both murderers view their victims this way. More specifically, F-suke/Kuzuryuu's sister was seen as a selfish Spoiled Brat who used her parents' connections to avoid any punishment for her cruelty to D-ko/Koizumi, and F-suke wanted to make certain her murderer/Satou was punished.
Assimilation Plot: AI Enoshima's goal. If the survivors "graduate" the simulation, then she'll be able to download herself into the bodies of the deceased students. From there she can steal the technology from the Future Foundation and use it to infect the rest of the world.
Ax-Crazy: The entire cast (sans Nanami, who's an AI) were previously this, thanks to previously belonging to Ultimate Despair before they were put in rehabilitation. Mikan eventually turns back into this when she reverts to her Ultimate Despair self.
Bait and Switch: The game loves to pull this and play on your expectations from the first game.
Usami reassures everyone that they've been invited to an island to make friends with each other, complete with a peppy J-pop opening song... then Monokuma shows up and immediately reverts everything to the "murder" format.
In Chapter 1, Komaeda confesses in court to a murder plot... but his plan actually failed.
The execution of Chapter 1 is a callback to the first execution in the original game... except Hanamura doesn't get blown up, he gets deep-fried in a volcano.
It is revealed in Chapter 5 that in Chapter 1, the victim is not Togami, as the player is led to believe, but a Super High-School Level Imposter pretending to be him.
Beach Episode: During the Prologue, Hinata doesn't fully relax until Usami gives everyone school swimsuits and encourages them to play on the beach.
A more traditional type happens in Chapter 2. Naturally, it gets derailed by the discovery of a body before things can get into full swing.
Bedmate Reveal: In chapter 3, following the outbreak of the Despair Disease, Hinata wakes up in the hospital to find that Mikan has fallen asleep next to him. It also happens again just before the chapter's murder.
Big Damn Heroes: Just as the remaining students are about to hit the Graduate button (which would allow AI Enoshima to possess their dead friends) Naegi shows up to save them.
Then later during the same trial, Naegi needs two more people to initiate a forced shutdown and stop AI Enoshima. Cue the arrival of Kirigiri and Togami.
Bittersweet Ending: The survivors escape and, through a miracle, retain their memories of the island and don't revert. Through this, they stay on the Jabberwock Islands to tend to their comotose friends and have vowed to create a new future of hope for themselves, Naegi implying they will eventually succeed. Also, despite the belief that Hinata would be "reset" to Izuru Kamukura and lost forever, he retains some measure of control and sanity, possibly via a Split Personality Merge.
In Chapter 1, there is a failed murder attempt using a knife stolen from a kitchen. Both execution cutscenes also begin with the agitated culprit being dragged out of the courtroom by the throat.
In Chapter 2, the victim is bludgeoned to death with a single blow. There are hints that a serial killer is responsible but that turns out to be untrue.
In Chapter 3, there is a double murder, and the first body found is actually the second to be killed. The game also hints that two people are responsible (like the first game) but in this case it is a Red Herring. Also involves someone recovering their memories.
In Chapter 4, it is initially unclear on whether it is suicide or murder. The final words of the perpetrator motivate the students to keep living.
Also, the culprit notes that there was a possibility of them being killed by their target instead, which would have led to a very confusing case...just like with Sayaka Maizono in the first game.
In Chapter 5, the murder is staged with the goal of having a specific target (or in this case, targets) executed by the trial. The victim's death also involves the Spear of Gungnir, and the initially suspected cause of death is not what killed them.
"Or, in other words… that one of us is a serial killer? That sounds like a plot twist from some kind of weird game or something…" referencing Fukawa's split personality as Genocider Syo.
The password the students were looking for ended up being 11037.
Komaeda's suicide, stabbing himself, tying himself up, poisoning himself, and spearing himself, mirrors most of the DR 1 deaths: Maizono was stabbed, Fujisaki was tied up, Oogami was poisoned, and Ikusaba was speared.
At the end of the game, Hinata appears to converse with Nanami's spirit. Afterwards, he gets white hair, red eyes, and a Battle Aura. This is basically what happened when Ishimaru channeled Owada's spirit in the first game, only this time it's Played for Drama.
Most of the characters are amnesiac members of Super High-School Level Despair, which is the same as the big twist of Dangan Ronpa Zero.
Cheat Code: In Chapter 2, Nanami reveals that the cryptic message at the end of Twilight Syndrome ("Gokai shita") is actually a hint to a cheat code that can be entered at the title screen. "Gokai shita" can be translated both as "You misunderstood" or as "Five times down". Hinata misunderstood thinking was the former, but Nanami tells him it is actually the latter, prompting the player to press Down 5 times on the title screen. It's required to beat the game and reveal the "motive".
The garbled message on Nanami's front door after the Chapter 5 trial (which may or may not have been her dying thoughts as she was executed) has her trying to recite the Konami Code.
Continuity Nod: There's quite a few references to Dangan Ronpa Zero sprinkled throughout. Not just in plot points from the novel coming into play at the end (Re:The Reserve Course and Kamukura), but also in two of Komaeda's favourite gifts, which both are references to the book.
Class Trip: The reason why the class has ended up on the island. At least, until Monokuma showed up.
Closed Circle: An isolated chain of islands, where there's no boats and the only planes in the airport are missing their engines.
Cult Of Personality: The Super High-School Level Despair group worships the original "Super High-School Level Despair" Junko Enoshima, going so far as to carve up her dead body and surgically replace their own body parts with hers.
Death by Irony: Not to as great an extent as the first game, but some of the executions still count.
Deconstructor Fleet: The entire game seems designed to play the similarities with the first game only to ultimately subvert them. The entire ending calls many things stated about the academy and hope itself into question.
Denser and Wackier: The setting is far more outlandish than that of the previous game, exchanging the sealed-off Academy for an entire series of tropical islands guarded by Humongous Mecha and including amusement parks and military bases with guns and rocket launchers just lying around everywhere. The executions are even more over-the-top, and one character is even turned into a robot at one point. It all makes more sense, though, once you figure out that everything is a VR simulation.
Deserted Island: The Jabberwock Islands. Subverted in that the islands aren't entirely devoid of civilization - there's a hotel and other buildings built there. However, other than the students, there are no other people around. This is mostly because of what it turns out they actually are.
Drawing Straws: Komaeda suggests this as a way to determine who gets to clean up the lodge. He ends up with the short straw. Of course, this later turns out to be part of his murder scheme.
Egopolis: Most of Jabberwock Island is this for Monokuma (with a few holdovers from Usami suggesting that it was supposed to be the same way for her, too.) The Junko AI eventually plans to turn the entire world into "Enoshimaland" by taking over everyone on Earth.
Empty Chair Memorial: Just like the first game, dead students are replaced during School Trials with a "memorial" picture that has their face crossed out. However, the game adds a bit more Black Comedy by customising the cross marks of certain students, namely the guilty ones. The customisations are: Hanamura's cross is a knife and fork; Tsumiki's cross is made up of bandages and rotated so it looks more like a first aid symbol; Pekoyama's cross is a shinai and sheath; Tanaka's cross is a capital letter "X"; and Komaeda's cross is dripping blood.
Empty Shell: Monokuma claims the students killed in his game were reduced to this. Hope is held out in the end that their condition is more of a Convenient Coma.
Eye Scream: Monokuma inflicts this on Usami when he takes over, then mocks her about it, calling her Monomi from then on.
Later on, Kuzuryuu loses an eye when he tries to stop Peko's execution.
During a montage that demonstrates the kind of self-mutilation that members of Super High-School Level Despair inflicted upon themselves, one of the examples is of someone who gouged out their own eye and replaced it with the eye of Junko Enoshima. He and Kuzuryuu might actually be the same person.
During the first trial, Komaeda presents himself as an increasingly obvious candidate for being the culprit. Helps that he really was planning to cause a murder...
Twisted all around during the second trial, where Pekoyama claims after the trial she was taking the fall for somebody else so they could successfully graduate, assuming that this person merely saw her as their tool.
Foreshadowing: Early on, Monokuma announces that there is a "traitor" in the group of sixteen students. In many official images, such as the soundtrack album or even the image at the top of this page, Chiaki Nanami is either drawn separately from the main group or in a markedly different way (such as being upside down). She's the one who doesn't belong in the group.
Additionally, some of the decorated backgrounds behind the characters in the game's intro tell of later events. For example, Tanaka's background is that of glowing "magic circles", and during his execution he tries to save himself by drawing magic protection circles on the ground.
On the topic of Tanaka, his first Free Time event has him ask Hinata his "True Name". While it is a question asked due to Tanaka's eccentric behavior, it becomes a bit Harsher in Hindsight given the reveal of Kamakura Izuru.
Another case happens with "The Wizard of Monomi", which was used as a basis for a "copycat murder" in Chapter 3. There were three deaths in the movie but only two murders in that chapter, because the most people a culprit can murder is two. The third unused death was "Tin Monomi being broken down into a heap of scraps." Guess what happens to Mecha Nidai the next chapter.
The interface indulges even more in retro 8-bit aesthetics than the previous game, which hints at the events of the story being a literal game inside of a computer program. This helped by the music suddenly turning into a chiptune version of the final investigation theme in Chapter 6 as the simulation continues to break down.
Freudian Slip: In the 3rd trial, following the culprit, Tsumiki's Yandere-esque personality transformation, Hinata must point one out to progress to the Panic Talk.
Gender-Equal Ensemble: Much like before, and now we even have a female mascot character to balance out Monokuma with Usami/Monomi.
However, unlike in the first game, this is averted with the surviving cast (2 girls/3 boys).
Germans Love David Hasselhoff: In-universe example—Sonia mentions a certain anime is insanely popular in Novoselic. She herself is a great fan of old Japanese police shows.
Grand Finale: While its not the end to the franchise itself, the game puts an end to the story of Hopes Peak Academy and Junko Enoshima. Enoshima even states in the final trial she won't be taking up the Monokuma handle again.
Hard Work Hardly Works: The subject of a monologue/Hannibal Lecture at the start of Chapter 2, where Komaeda claims that unless somebody's born with incredible talent, they can never earn it.
Hate Plague: A non-supernatural version of this is essentially the end result of Super High-School Level Despair's ideology. It began when the reserve students were Brainwashed and Crazy by Junko Enoshima and revolted against Hope's Peak Academy over their shabby treatment compared to the "main course" students. This spread into general social revolt due to the talents of SHSL Despair as the "have nots" rebelled against the "haves", and eventually descended into war without purpose.
Heel Realization: The entire main cast, who realise that they are the remnants of Super High School-Level Despair, and thus the students who caused The Biggest, Most Despair-Inducing Incident In All Of Human History.
Hinata realizes that the person who allowed the events of the game to take place was himself, when he smuggled the AI Enoshima program into the system as Kamukura.
Hope Is Scary: Arguably the entire point of the game, for how interrelated hope and despair are as concepts.
Hopeless Boss Fight: When the Junko AI causes everyone to come close to crossing the Despair Event Horizon in the Chapter 6 trial, the next Nonstop Debate section glitches out so that the evidence bullet can't be fired, and Hinata's health bottoms out once it finishes.
Interface Screw: The investigation and second half of Chapter 6's trial has many of these.
Laser-Guided Amnesia: Monokuma reveals early on that all of the cast have had their memories stolen by the Future Foundation. This is true, but for good reason: they were all traumatic memories of their time as part of Super High-School Level Despair, and the New World program was designed to create new, happier memories to fill the gap.
Late-Arrival Spoiler: Even if he looks quite different in this outing, the presence of a character named Byakuya Togami with an identical talent suggests that he survived the first game.
Leaning on the Fourth Wall: In Chapter 6 after the reveal that the game took place within a program, Monokuma compares it all to a 'game world', leading to this from Souda:
Souda: "If this is a game...then is everything I'm saying showing up in some kinda text box?"
Lighter and Softer: The game starts out looking like this. Its first opening animation is very upbeat, almost dating sims like, and the colors of the characters and the environment are notably much brighter than its predecessor. And then Monokuma comes into the picture...
In the end, the game arguably still qualifies. Compared to the original, the game keeps a much more optimistic attitude in regards to a lot of things and ends on a much more overtly hopeful note.
Loophole Abuse: In Chapter 5, Hinata demands that Monokuma stop Komaeda from blowing up the islands by pointing out that it breaks one of the rules. Monobear refuses, stating that the "no-one can kill more than two people" rule does not take effect until after it has been broken.
Lost Forever: On a given playthrough, you obviously can't spend Free Time with someone after their death. In addition, if the player doesn't spend time with Komaeda during the first two free time opportunities in Chapter 1, you can still spend time with him but cannot get his actual Free Time events.
Lotus-Eater Machine: The entire game is revealed to be this, as a radical new method for rehabilitating those who were Brainwashed and Crazy by Enoshima and Super High-School Level Despair by replacing their traumatic memories with new, happy ones.
Meaningful Echo: Naegi uses 11037 as a pass-code for the students to use to assure their safety, the same "number" Maizono scrawled on the wall to save him during the first game's first trial.
In Chapter 2, an extended Fanservice sequence ends with Souda stumbling across the second murder victim. The murderer's being wet in this sequence is later used against her.
In Chapter 3, Mioda tries to raise everyone's spirits with a rock concert, provoking some hilarious reactions... until Monomi interrupts with the news that Owari is trying to kill Monokuma, and everyone runs off, leaving Mioda in tears.
After revealing information that made up one of the final, climactic reveals of the first game, Monobear declares that "A cheap story would shamelessly leave that revelation hanging until the endgame! Can you imagine?! Fortunately, I’m not that cowardly."
"Or, in other words… that one of us is a serial killer? That sounds like a plot twist from some kind of weird game or something…"
When infected with Despair Fever and only able to tell lies, Komaeda goes on a bizarre rant claiming that one of the students is actually a pair of twins masterminding the mutual killing.
Nebulous Evil Organisation: The Future Foundation is made out to be this by Monokuma. At first Hinata believes it to be true because the Future Foundation took away his memories. Except it turns out that the Future Foundation was on the side of the students all along, and the entire game was an attempt to rehabilitate their Brainwashed and Crazy personalities instead of just killing them all. In fact, the final chapter has Hinata subverting the trope by shooting down his own arguments about how everything is the fault of the Future Foundation.
New Transfer Student: After getting the "lying fever," Komaeda claims that Nidai succumbed to his wounds, and that an exchange student will be coming in to replace him. Given the nature of his condition, though, this doesn't end up happening.
Nice Job Breaking It, Hero: Hinata, whose self-hatred and longing to be "talented" was so strong that he willingly took part in a project to supresss his real identity and be rebuilt as the multi-talented "Super High-School Level Hope", Izuru Kamukura. Then he fell under Enoshima's influence, murdered the student council, kickstarted The Worst, Most Despair-Inducing Incident Of All Human History, and made the events of Super Dangan Ronpa 2 possible by smuggling AI Enoshima into the Lotus-Eater Machine.
Not What It Looks Like: Hinata says this to Kuzuryuu, after he is discovered with Tsumiki in his bed (she crept into it while he was sleeping).
Ordinary High-School Student: Komaeda claims to be this. Subverted, as he is insanely lucky. But played straight with Hinata, who has no Super High-School Level talent.
Out-of-Character Moment: Chapter 3's motive has this happen to several characters thanks to Monokuma infecting people with a "despair disease" in order to provide a "motive" to kill.
Painting the Medium: By the end of chapter 5, dead characters start popping out of nowhere and the game screen starts becoming pixelated, with blocks of the screen falling off at any given time and text being placed where it really shouldn't be. This is to represent that the virtual reality the characters find themselves in are on its last legs.
Poor Communication Kills: Basically the theme of Chapter 2, where the murder occurs because Pekoyama fails to understand what Kuzuryuu wants from her. Koizumi also falls victim to this as well, yelling and chastising Kuzuryuu for his role in Twilight Syndrome when she wanted to atone for her actions.
Power Dyes Your Hair: Along with Ishimaru in the preqel (although less important to the plot), Hinata's hair turning white is a perfect example of this in the final chapter.
The fake Byakuya Togami. He just turns out to be the nameless Super Duper Highschool Imposter, who has no real identity of his own. Monobear explicitly states that the mystery didn't turn out to be important.
The countdown timer. Junko admits it was just there to provide atmosphere and to be a Self-Imposed Challenge on herself.
Relationship Values: Like the first game, the protagonist can hang out with the other students and give them presents. This time, you'll be rewarded with Hope Shards which can be exchanged for skills during the trial sequences.
Also, like the first game, there's a limited number of free time segments in each chapter, and you can't hang out with someone if they're dead. There are also certain characters who are unavailable at certain times for plot reasons. However unlike the previous game there is now one character that you can'tmake any relationship progress with unless you spend some time with them at least once before a certain event, so even though you can technically spend time with them afterwards nothing will happen if you missed their "deadline" earlier which is very easy on a first time un-spoiled play through.
The Remnant: The entire cast of students, with the exception of Nanami, are what's left of the original SHSL Despair group that kickstarted The Worst, Most Despair-Inducing Incident In Human History.
Sacrificial Lamb: Saionji teases Souda by calling him a 'background character' who's doomed to suffer an early death. His profile on the official Japanese site even implies the exact same thing. Subverted, because he's not! He doesn't kill anyone and he isn't executed, while Hiyoko herself gets killed in chapter 3.
Sadistic Choice: Kill one of your classmates, or spend the rest of your life in captivity - and when it comes down to the trial, fess up and receive a gruesome punishment, or escape with the blood of everyone else on your hands.
Chapter 4's motive boils down to choosing between starving to death alongside everyone else or committing murder to get out.
In Chapter 5, Komaeda's Thanatos Gambit forces the students to either convict an innocent party (the one who accidentally and unknowingly killed him) or sacrifice her so that they can live.
In the final chapter, the students are given a choice: choose to "Graduate" and leave the island with their new memories but enable Enoshima's AI to hijack the bodies of everyone who died in the game; willingly stay in the Lotus-Eater Machine with all of their friends but doom the three members of the Future Foundation who came in to help them; or force a shutdown that would destroy Enoshima's AI but also erase their new memories, resetting them back to how they were before the game started along with the memories of all the atrocities they committed as part of Super High-School Level Despair.
Sequel Hook: Naegi notes in the epilogue that, while the games events are over, the Despair Incident isn't...
Ship Tease: Hinata gets a bit of this with Nanami and Komaeda. Sonia and Tanaka share some qualifying moments together as well.
Tanaka's insistence that his pet hamsters are actually shape shifting "Dark Lords of Destruction" may be a reference to how in the Blue Exorcist anime Amaimon, the Demon King of Earth, used the form of a hamster as his Sleep Mode Size.
When Hinata reveals the murder weapon of the Twilight Syndrome Murder Mystery (gravel wrapped in a school swimsuit) Ibuki says that it's an idea that would astonish even Mr. Wright himself.
The "Titty Typhoon" building and its design is a reference to From Dusk Till Dawn's "Titty Twister" bar.
Show Within a Show: In Chapter 2, Monokuma presents the students with a doujin game called Twilight Syndrome, which functions as Shmuck Bait: completing the game reveals a motive to kill, but if you choose not to play and someone else does, then you might be in danger and not know about it. In the end it gets revealed that the game covers two murders that happened during the period that their stolen memories are from, specifically the murder of Kuzuryuu's sister and that of her killer Satou.
Shut Up, Hannibal!: A lengthy monologue at the start of Chapter 2 is finally cut off by an unknown speaker screaming "SHUT UP!" (It's later revealed that this was Souda.)
Nanami calmly tells both Komaeda in Chapter 1 and Monokuma in Chapter 2 to be quiet.
Similar Squad: There are some noticeable similarities between the new students and the batch from the first game. However, much of it is used to later subvert audience expectations with Komaeda's status as Naegi's Evil Counterpart being the most obvious example.
Sock It To Them: A variant is used during Monobear's Twilight Syndrome scenario. The murder weapon is eventually determined to be a stolen swimsuit, stuffed with gravel from the broken aquarium near the body.
Stepping-Stone Sword: This is how Chapter 2's murderer managed to leave the scene of the crime without leaving any footprints behind - by using her wooden sword as a ladder to reach a window high up in the shower room.
Stuff Blowing Up: In Chapter 5, Komaeda decides the best way to flush out the traitor is to start blowing up everything, threatening to destroy all of the islands unless they expose themselves. It turns out to be a bluff.
Supporting Protagonist: It's eventually revealed that the students are nothing more than pawns for the AI Junko to play with in order to lure out the real "main characters", aka the survivors from the first game. Once she finally makes her appearance, she continuously makes it clear that Hinata and co are nothing more than supporting roles in the big picture.
Take a Third Option: Nanami's speech to Hinata in the final chapter essentially boils down to this.
Tall Poppy Syndrome: The mysterious voice who talks to Komaeda in the mind-screwy "Chapter 0" believes that the world is like this, with talentless people hunting down those with talents and driving the world into an evolutionary dead end. It's revealed near the end that the voice belongs to Izuru Kamukura.
Ten Little Murder Victims: Monokuma invokes this by announcing early on that there is a "traitor" in the group of sixteen students. Subverted on multiple levels: Yes, there is a mole. No, she is not a murderer but instead is a "mole" working for the good guys to observe and support the students. And no, the knowledge and suspicion of a "mole" does not lead anyone to commit murder: Komaeda uses this excuse as a bluff to try and kill everyone but the mole.
This Is a Work of Fiction: Inverted in-series with the game Twilight Syndrome, which comes with a disclaimer that the events depicted are factual and any resemblance to actual persons, living or dead, is entirely deliberate. It's later is indeed this, with the evidence being enough for Kuzuryuu to order a murder.
Treachery Cover Up: Hope's Peak attempted to cover up Kamukura's murdering the student council because of his involvement in the Ultimate Hope Project. When SHSL Despair revealed this to the world, all hell broke loose.
Trust Password: Used by Hinata during the final chapter to prove that Naegi, who joined the class trial to persuade the survivors to graduate, wasn't the real deal. The imposter, controlled by Monokuma, could not remember why the real Naegi chose 11037 as the password to the ruins.
Villain Has a Point: In Chapter 4, Tanaka shoots back after being berated for being the culprit:
If one would call murder so that one may live "evil", then what must one call surrendering on life itself?! If the world shall name it just, then I shall fight that world with all my strength! For to renounce life and choose death is to blaspheme life. It is the perversion of nature, the conceit of mankind!
Shortly after this, he says, "You must agree that this is a better outcome than us all starving to death in that surprise house...". Nanami doesn't contest this reasoning, simply saying, "So that conviction led you to commit this crime..." with a sad and resigned expression on her face.
Virgin Sacrifice: Sonia asks Tanaka to take her along next time he goes to the amusement park of Hell. When he says that the admission is the blood of a virgin, she dejectedly says that her blood would not meet the requirement.
Well-Intentioned Extremist: The Future Foundation in general. Their goal is to bring hope back to the world, and they're willing to execute the remaining members of SHSL Despair in order to do that.
Wham Episode: The ending of Chapter 5. Hinata goes out after a day of rest, on the last day on the countdown, and encounters Nanami - who died in the last trial. Then the other dead students start appearing, although they're never displayed in-world. The survivors witness the last message left by Komaeda, who gives them the password to the ruins on the second island - 11037. Then they actually get to the ruins, and everything glitches out of whack.
During the Chapter 5 trial, Nanami starts acting strangely, ending with this:
Nanami: "But ... there’s nothing they could have done ... since even if they had wanted to confess ... they couldn’t have ... Because they weren't made that way. So ... I want you guys to try and guess. (...) The Future Foundation spy, the traitor hidden amongst us... who do you think it is?"
During Chapter 6:
Naegi: The real bad guys... are you guysnote (Hinata and his friends).
Completing the game once unlocks Dangan Island, an alternate scenario where Monobear fails to take over and the class trip goes as planned, focusing on socializing and getting to know your classmates better.
Dangan Ronpa IF, meanwhile, asks "What If? Naegi regained his memories before the murders started in Dangan Ronpa?"
Your Mind Makes It Real: Despite the students being trapped in a massive computer simulation, the program works too well, meaning that anybody who dies inside it effectively becomes braindead in the real world. Possibly.