History VideoGame / YsIXMonstrumNox

* SequelHook: At the end of the game, Dogi asks Adol where shall they go for their next adventure - Garman or Britai. He also muses if Adol plans to put down roots somewhere, only to brush it off by admitting that the open road suits them better.

''Ys IX: Monstrum Nox'' is the tenth primary installment of the ''VideoGame/{{Ys}}'' franchise, developed and published by Creator/{{Falcom}}. Originally released on September 26, 2019 in Japan for the Platform/PlayStation4, it launched internationally for the same platform on February 2, 2021, published by [[Creator/NipponIchi NIS America]], while the PC, Platform/NintendoSwitch and UsefulNotes/GoogleStadia got their versions on July 6, 2021. Taking place after ''VideoGame/YsSeven'', ''Ys IX'' is set in the Prison City of Balduq, a major city located in the Gllia-Erdlingen region, which is a Romun province located on the northeast Esterior peninsula on the continent of Eresia. The main focus of the game surrounds the titular Monstrums, a group of people possessing supernatural abilities.

''Ys IX: Monstrum Nox'' is the tenth primary installment of the ''VideoGame/{{Ys}}'' franchise, developed and published by Creator/{{Falcom}}. Originally released on September 26, 2019 in Japan for the UsefulNotes/PlayStation4, it launched internationally for the same platform on February 2, 2021, published by [[Creator/NipponIchi NIS America]], while the PC, UsefulNotes/NintendoSwitch and UsefulNotes/GoogleStadia got their versions on July 6, 2021. Taking place after ''VideoGame/YsSeven'', ''Ys IX'' is set in the Prison City of Balduq, a major city located in the Gllia-Erdlingen region, which is a Romun province located on the northeast Esterior peninsula on the continent of Eresia. The main focus of the game surrounds the titular Monstrums, a group of people possessing supernatural abilities.

* TheHeartless: [[spoiler:Lemures are the AnthromorphicPersonification of negative enmity by the Gllians that arose since the Hundred Years' War between Gllia and Britai, which is further accentuated by the Romun Empire's victory from the Erdlingen War and their annexation of Gllia eight years ago upon conquering the Kingdom of Gllia, including their present day occupation of Balduq]].

* AndNowForSomeoneCompletelyDifferent: Every now and then, control of the game shifts from Adol and the Monstrums [[spoiler:to another "Adol", who is still trapped in Balduq Prison]].

* UnexpectedGameplayChange: In the segments where [[spoiler:players control "Adol" who is still trapped in Balduq Prison]], DoubleJump, attack skills, Gifts and Sacramentals are locked out for use. The focus of game-play changes to avoiding traps and solving puzzles.

** The end of Chapter 2, "The White Cat's Melancholy": the story's perspective switches [[spoiler:from Adol to "Adol", who's still locked up in Balduq Prison, despite the former already having escaped in the previous chapter]]. This is the first sign that nothing in ''Ys IX'' is what it appears to be.

* TheCameo:
** By completing Marguerite's Azure Petals {{Sidequest}}, [[spoiler:various souls briefly possess her so they can speak a short message to Adol. These souls return at the climax of the game [[BigDamnHeroes to help Adol]] [[EarnYourHappyEnding put an end to the Grimwald Nox]] for good, none other than Feena, Reah and Dark Fact from ''Ys I: Ancient Ys Vanished - Omen'', Eldeel from ''Memories of Celceta'', Tia from ''Ys SEVEN'' and Dana Iclucia from ''Ys VIII'']].
** In one of the illustrations regarding Credo during the end credits, Geis from ''VideoGame/YsVITheArkOfNapishtim'' and ''Ys SEVEN'' can be seen from the group of mercenaries.
* CantDropTheHero: {{Averted}} like previous ''Ys'' games with the party system - Adol does not need to be part of the active party.

* SequelHook: At the end of the game, Dogi asks Adol where shall they go for their next adventure - Garman or Britai.

* HybridMonster: The BonusBoss, Vakh Medios, is an amalgam of the many Lemures encountered during Grimwald Nox events throughout the game.

* TheGuardsMustBeCrazy: Balduq Prison guards don't seem to care much about what [[spoiler:the real Adol]] gets up to so long as the character returns to their cell whenever there's a scheduled patrol in the cell block. Upon getting into the Special Sector, everyone assumes that they're someone entitled to be there and free to walk around rather than a prisoner from another section who broke in, despite being in dressed in clothes far too poor for the upper-class inmates of the Special Sector. The guards also never appear to search their cell, because while failing to notice that a prisoner a small length of wire used as a makeshift lockpick might be explainable due to its size, not noticing that a prisoner has a ''sword'' would be totally unacceptable to any sane security guard.

* TheGuardsMustBeCrazy: Balduq Prison guards don't seem to care much about what [[spoiler:the real Adol]] gets up to so long as the character returns to their cell whenever there's a scheduled patrol in the cell block. Upon getting into the Special Sector, everyone assumes that they're someone entitled to be there and free to walk around rather than a prisoner from another section who broke in, despite being in dressed in clothes far too poor for the upper-class inmates of the Special Sector.

* TheGreatestStoryNeverTold: The Grimwald Nox is an obscure part of the dead Nors religion that faded into mythology centuries ago. As such, the general public has no knowledge that the Monstrums are protecting Balduq from it.

* LuxuryPrisonSuite: The "Special Sector" of Balduq Prison is essentially a five-star hotel that wealthy and powerful criminals are "imprisoned" in for a fee, making their sentences a luxury vacation, while the heat from their crimes cools off rather than become a punishment.

* ClarkKenting: After breaking out of Balduq Prison, Adol simply dyes his hair black and wearing an oversized red scarf to avoid drawing attention to himself. Given that he'd only met a handful of people before getting locked up and meeting them briefly, it works.

* BonusBoss: Vakh Medios, the Lord of all Lemures is this -- a level 95 MarathonBoss that can only be accessed by achieving all S-ranks in Grimwald Nox events. Defeating it nets an achievement and the "Crown of Dawning" accessory that adds all three attack attributes of piercing, slashing and striking, while [[LifeDrain absorbing 6% of damage dealt to enemies]].

* OldSaveBonus: ''Ys IX'' on the [=PlayStation 4=] will award two bonus accesories if it detects a save file from ''Memories of Celceta'' and ''Ys VIII'' - the former features "Celcetan Wreath"[[note]]+10 Defense, 200 HP and resistance to curse[[/note]], the latter gives the "Old Seal Ring"[[note]]+15 Strength and Defense, increase user's CriticalHit rate to 30%[[/note]].