"I think about myself in that dream. Is this me, or is this not me?"
"Are dreams reality, or are reality dreams? Ive reached an awfully simple answer."
"Whichever is fine.
"Which is true or which is not true. Both are reality."
—>An excerpt from "Baldeux's Cell"
Ys IX: Monstrum Nox will be the ninth primary installment of the Ys franchise, developed and published by Falcom. Slated for a September 26, 2019 release in Japan, it will be available on the Sony PlayStation 4. Although details are scarce, Ys IX will take place after Ys SEVEN in "Baldeux", a "Prison City", located on the Eresian continent northeast of Esteria in the Gllia Eldligen region, with a mystery surrounding the titular "Monstrum", a group of people who possess supernatural powers. According to Falcom, players will be able to utilize similar abilities like the Monstrum in order to explore the setting, while being able to form a guild within Baldeux. Furthermore, series protagonist Adol Christin returns, but the developers have stated he is missing in action at the start of Ys IX.
There was a gameplay reveal video at the Dengeki Game Festival 2019.
Tropes applicable to Ys IX: Monstrum Nox include:
- Ability Required to Proceed: In each chapter where a monstrum joins your party, it is impossible to go through the story dungeon without using his or her monstrum ability. Later dungeons require uses of multiple abilities to pass.
- Agent Scully: Ingrid, the cross examiner from the Romun Empire, who considers Adol's stories as complete nonsense.
- Beauty Mark: Yufa has one. This is one of many clues that she is Raging Bull's true identity.
- Blood Knight: Hawk is very excited about fighting. In fact, at the beginning of Chapter 2, he even tries to pick a fight with Adol for little to no reason, only to be restrained by Aprilis as monstrums cannot fight each other.
- Broken Bridge: Certain areas of Baldeux are unavailable until Adol and his party defeat enough Larva to fill the Nox gauge and overcome Grimwald's Night events, which tend to be Tower Defense mini-games.
- Came Back Wrong: Xavier was originally one of the historical figures from Baldeux 500 years ago, but something went wrong in the process of reviving him and he came back as a roo instead of human. This is also the reason why he can speak human language just fine and does not contain the word -ru in his name.
- Cat Girl: White Cat is exactly this. Events show that her tail and cat ears are real.
- Clark Kenting: After breaking out of Baldeux's jail, Adol simply puts on a black wig as a disguise to avoid drawing attention to himself.
- City of Adventure: Much of the game takes place within Baldeux as Adol and other monstrums fight off demons from Grimwald's Night as well as run into various mysterious events that take place there.
- Closed Circle: All monstrums cannot leave Baldeux as they are forced to appear whenever Aprilis summons them to battle larva from Grimwald's Night.
- Continuity Nod:
- While interrogating Adol, Ingrid mentions several events that frequently happen to Adol during his adventures, such as his bad luck with boats and tendency to lose all equipment between games, asking Adol if he is doing them on purpose.
- There are several returning monsters from previous games, which Adol can point out in his dialogue options.
- General Leo, one of the characters from Ys: Memories of Celceta, is mentioned to be the one responsible for capturing the city of Baldeux during the war between the kingdom of Glia and Romn which occurred eight years ago.
- Alchemy, which is central to the main plot of the game, is explicitly mentioned to have come from Xandria, the setting of Ys V.
- Conveniently an Orphan: All monstrums except Adol and Doll are this. Justified as they are actually clones of the historical figures from Baldeux 500 years ago, meaning they never had real parents to begin with.
- Cloning Blues: The big reveal of the game is that not only is Adol we control for much of the game a clone of the real Adol but also other monstrums except the Doll are clones of the historic figures from Baldeux 500 years ago.
- Dark Is Not Evil: Renegade's power involves shadows but he is a monstrum who fights alongside Adol to hold Larva from Grimwald's Night at bay.
- Fallen Princess: Iris is revealed to be Princess Eleonore of the kingdom of Glia, which was destroyed by the Romun empire several years ago.
- Fusion Dance: The Crimson King and the real Adol do this near the end of the game as the Crimson King's lifespan is running out and Zora needs to be stopped.
- Gameplay and Story Segregation: Despite being wanted for various reasons, Adol and other monstrums can transform and use monstrum powers right in front of townspeople and guards without any reprecussion during gameplay.
- Giant Spider: There are some aggressive spiders that are several times larger than a human in the game, with bright blue eyes and equally blue spots on their carapace. A particularly large one serves as a boss in Chapter 4.
- The Heartless: Larva from Grimwald's Night turn out to be these as they are created from negative emotions of people living in the Glia region.
- Ill Boy: Jules is this as he needs a wheelchair to go anywhere and is expected to have a very short lifespan. It is the reason why Renegade does not mind the curse of Grimwald's Night as the curse at least allows him to be mobile and healthy while he is transformed.
- "Just Frame" Bonus: Flash Guard and Flash Move from previous games return.
- Just Like Robin Hood: White Cat's MO. She steals from the rich and drops the loot for the poor to pick up. Deconstructed in that this only led to slum people's becoming reliant on her instead of making an effort to improve their lives.
- Laser-Guided Amnesia: Doll has this. She does not remember how she has come to have emotions and knows there is something she needs to look for, yet has no idea what it is.
- Legacy Boss Battle: Nygtilger and Vagullion from Ys I and Ys Origin and primordials from Ys VIII: Lacrimosa of Dana show up as bosses and regular enemies. Justified in that they are created from Adol's memories.
- Omnicidal Maniac: Atola, the divine being created by Zora, declares his intention to combat the threat of Grimwald's Night by removing monstrums who are no longer needed and killing all humans in Glia whose negative emotions are responsible for creating larva.
- One-Winged Angel: Grandmaster Chatelard and Atola go through this using the power of alchemy.
- Sequel Difficulty Spike: Zigzagged. Enemies are more aggressive in general and some require certain monstrum abilities to fight effectively. Also, SP costs for skills have increased overall while SP reduction accessories have their effects reduced so skill spam isn't as viable as it was in previous games, at least until the SP gauge gets sufficiently upgraded. However, monstrum abilities, if used right, give more options to the player (for example, Crimson King's monstrum power can instantly bring the character right in front of the enemy) and SP gauge now fills automatically while the player is not attacking. Flash Guard/Move are still present.
- Shrinking Violet: Kilysha is a innocent, shy person, in stark contrast to her monstrum self, White Cat.
- Stationary Wings: Hawk's monstrum power generates a pair of large, black, crow-like wings, but which do not actually flap during flight. Gameplay-wise it is Not Quite Flight as it works as a glide.
- Stripperific: Doctor Saradhi's outfit once she takes off her Labcoat of Science and Medicine.
- Super Strength: Raging Bull's monstrum power. It allows her to break certain obstacles and remove enemies' protections.
- Team Mom: Yufa who acts as this to her younger siblings.
- Tomato in the Mirror: It is revealed near the end that Adol we control for much of the game is actually a homunculus created by Big Bad while Adol the player periodically controls for segments of the Baldeux prison is the real deal.
- True Sight: Doll's monstrum power. In particular, it allows the party to see hidden objects or weak points of enemies.
- Turned Against Their Masters: Atola stabs Zora in the back once Zora declares Atola a failure and attempts to destroy him by pulling Atola's life support.
- Video Game Dashing: Crimson King's monstrum power allows him to instantly close distances through a dash move.
- Wall Run: White Cat's monstrum power lets her run straight up a wall without breaking a stride, as if gravity didn't exist.
- Well-Intentioned Extremist: Chatelard wishes to free the region of Glia from the Romun control. Unfortunately, he goes about it by making clones of extraordinary people across the world in order to raise an army. This also applies to Big Bad Zora, who experiments Adol so he may create a godlike being from Adol's memories in order to bring the threat of Grimwald's Night under control.
- You Killed My Father: Princess Eleonore AKA Iris tries to assassinate Cardinal Lindheim, the governor-general of Glia, as she holds him primarily responsible for death of her father and destruction of her kingdom. Subverted later on as she discovers that Lindheim did everything he can to stop the war between two countries and tried to protect the royalty of the Glia kingdom, causing her to give up her vengeance.