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[[caption-width-right:306:Adol Christin, saving the world for the umpteenth time.]]

->''"In my life, I've wandered everywhere... Around this world, hope would always be there."''
-->-- '''Excerpt''' from the opening of the English translation of ''Ys: The Oath in Felghana''

'''Ys''' (typically pronounced "ees"[[note]]Basically like "geese" without the G; this pronunciation is the one used by the series' current localization publisher, Creator/XSEEDGames[[/note]], though "yees" was used instead in the English localization of ''Ys: The Ark of Napishtim'') is a LongRunning ActionRPG video game franchise developed by Creator/{{Falcom}} and published by its developer in Japan and currently published by Creator/XSEEDGames in North America and Europe, with a ''large'' number of companies having localized licensed ports in the past (such as the [[UsefulNotes/TurboGrafx16 TurboGrafx-CD]] versions) that has spanned over twenty years and thirteen consoles. Nearly all titles chronicle the adventures of Adol Christin, a [[TheDrifter wandering]] [[HeroesPreferSwords swordsman]] with [[RedHeadedHero fiery red hair]] who always seems to be in the right place at the wrong time as far as [[TheEndOfTheWorldAsWeKnowIt world-threatening disasters]] are concerned. The eponymous "Ys" is a [[FloatingContinent mythical island floating in the sky]], which is visited in some games and merely referenced in others.

The games have a few recurring characters (leaving aside Adol, who is the primary playable character in every game except for the {{Prequel}}s ''Ys Origin'' and ''Ys Strategy'') and take place in the same world with a consistent {{Continuity}}, but otherwise keep things fresh by introducing a brand new cast of characters, location, and scenario for every major release, not unlike fellow traveling swordsman-starring series ''Franchise/TheLegendOfZelda''. Most are generally played with an isometric top-down perspective - the earliest games require Adol to "ram" into enemies in just the right spot to attack and defeat them, while later installments use a traditional HackAndSlash style of game-play (beginning with ''Ys V''). The franchise has gotten {{Video Game Remake}}s and "[[UpdatedRerelease re-imaginings]] of installments in order to fit them better into the series' ever-expanding mythology (simulataneously, {{Compilation Rerelease}}s like ''Ys I & II Complete'' and ''Ys Eternal'', remakes of ''Ys I'' and ''Ys II'', still feature ramming combat, which would be carried over to the PC and Sony UsefulNotes/PlayStationPortable version ''Ys I & II Chronicles'').

''Ys'' is also famous for its power-rock soundtracks composed by various members of Falcom's "JDK Sound Team", most famously by Creator/YuzoKoshiro (I-II) and Mieko Ishikawa (II-III) and performed by Ryo Yonemitsu (music for the UsefulNotes/TurboGrafx16 versions and the "Perfect Collections") and, more recently, Yukihiro Jindo (arrangements of ''Ys: The Oath in Felghana'' and ''Ys I & II Chronicles''). In addition to standalone soundtracks, the [=TurboGrafx-CD=] games have much of their in-game soundtracks encoded in the same standardized "Red Book" format as a typical audio compact disc, allowing ''the game discs themselves'' to double as soundtrack [=CDs=] when placed into a CD player or other optical media player. Meanwhile, the Windows version of some ''Ys'' games store their audio files in the [[http://www.vorbis.com/ Ogg Vorbis format]] (an open format, thus probably supported by almost any media player) and can be found and played by digging through the game's files and getting the ".ogg" files from the music folder. A few ''Ys'' re-releases also do special things with their soundtracks, specifically their soundtrack history[[note]]''Ys I & II Chronicles'' for the [=PlayStation=] Portable and the port of ''Ys: The Oath in Felghana'' to the same system have the option for players to choose between multiple versions of the games' soundtracks within the games themselves - ''Chronicles'' contains the original {{UsefulNotes/PC 88}} soundtracks from the first two games as well as the newer ''Complete''/''Eternal'' versions, both in addition to the the JDK-performed remixes (the other two options are synthesized) new to ''Chronicles'', while ''The Oath in Felghana'' contains the soundtracks from the PC-88 and UsefulNotes/SharpX68000 versions of the original ''Ys III: Wanderers from Ys'' in addition to the soundtrack originally composed for ''The Oath in Felghana'' itself[[/note]].

For the longest time, the franchise suffered from extensive NoExportForYou syndrome after the series' lackluster initial release push in the early 1990's, the primary reason why ''Ys'' was practically unheard of outside of Japan for so long. Beginning with the release of ''Ys VI: The Ark of Napishtim'' on the UsefulNotes/PlayStation2 and [=PlayStation=] Portable, ''Ys: Book I & II'' on the UsefulNotes/{{Wii}} UsefulNotes/VirtualConsole, and ''Legacy of Ys: Books I & II'' for the UsefulNotes/NintendoDS, the games started to reach a much wider audience, with XSEED Games having announced a partnership with Falcom in since 2010 that includes the localization of ''VideoGame/YsSEVEN'', ''Ys: The Oath in Felghana'', and ''Ys I & II Chronicles'' for the [=PlayStation=] Portable in the North American market, in that order. By March 2012, XSEED and Falcom followed this up with a series of releases on the UsefulNotes/{{Steam}} service of Creator/ValveSoftware, starting with the original Windows version of ''The Oath in Felghana'' and the Japan-only ''Ys Origin'', continued by a further-updated PC version of ''Ys I & II Chronicles''[[note]]Ironically giving ''English-speakers'' the definitive version of that compilation[[/note]]. Finally, both companies capped it off with the release of ''VideoGame/YsMemoriesOfCelceta'', Falcom's definitive version of the ''Ys IV'' duology on the UsefulNotes/PlayStationVita, released in English in November 2013.

Thanks to all this, the series' NoExportForYou tendencies are well and truly over, as ''Ys'' is now one of XSEED's most consistent sellers and the company has openly stated they'd love to work on any future releases. Between the [=PlayStation=] and Steam market, virtually every major ''Ys'' installment is available in English, both at retail and digital download. Although ''Ys V: Lost Kefin, Kingdom of Sand'' and ''Ys vs. Sora no Kiseki'' remain the only ones untouched, even that merely extends to official localization - a fully playable FanTranslation patch is available courtesy of Aeon Genesis for ''Ys V''.

The primary installments in the ''Ys'' franchise are:
[[hardline]]
* '''Ys I: Ancient Ys Vanished - Omen''' (1987)
** Platforms: PC-88, Sharp X1, UsefulNotes/PC98, [[UsefulNotes/FMTowns FM-7/77]], [[UsefulNotes/FMTowns FM-77AV]], [[UsefulNotes/{{MSX}} MSX2]], Sharp X68000, UsefulNotes/SegaMasterSystem, UsefulNotes/{{Famicom}}, MS-DOS, [[UsefulNotes/AppleII Apple IIgs]], Microsoft Windows, UsefulNotes/SegaSaturn, [=PlayStation 2=], Virtual Console, Nintendo DS, UsefulNotes/{{iOS}}, UsefulNotes/{{Android}}
** ''Ys I'' introduced the ramming-based combat called the "Bump Attack" system and RegeneratingHealth, the latter considered rare for {{Action RPG}}s and repeatedly used for subsequent installments. Furthermore, the perspective is taken from a top-down camera.
** Adol Christin sets out for his first adventure, winding up in the town of Minea on the island of Esteria. When a fortune teller speaks to him of an evil lurking in Esteria, Adol seeks out the Books of Ys, six tomes containing the history of the ancient "Eldeen" civilization and knowledge on how to defeat this darkness. ''Ys I'' also introduces the "Clan of Darkness", a group of recurring antagonists whose ties to Ys form the MythArc of the franchise.
* '''Ys II: Ancient Ys Vanished - The Final Chapter''' (1988)
** Platforms: PC-88, PC-98, Sharp X1turbo, FM-77AV, MSX2, Famicom, [=TurboGrafx-CD=], MS-DOS, Microsoft Windows, Sega Saturn, [=PlayStation=] 2, Virtual Console, Nintendo DS, iOS, Android
** The Bump Attack system returns for ''Ys II'', with the addition of introducing magic spells that can be used via wands.
** An immediate {{Sequel}} to ''Omen'', upon assembling the six Books of Ys at the end of the previous game, Adol is instantly transported to the mythical FloatingContinent. The secrets of Ys are unraveled in this game, alongside the identity of the twin goddesses and the Eldeen civilization they once belonged to.
** Because of its immediate {{Sequel}} status, any VideoGameRemake of ''Ys II'' is generally packaged together with ''Ys I'', the first being ''Ys Eternal'' on Windows in 1997 that has updated visuals; this was done again with ''Ys I & II Complete'' for the same platform in 2001. However, the definitive bundle is UpdatedRerelease ''Ys I & II Chronicles'' for the [=PlayStation=] Portable in 2009, featuring two different game modes, change in character portraits (from ''Complete'' or ''Chronicles'') and choice of soundtrack (the original PC-98, ''Complete'' or [=PlayStation=] Portable-exclusive re-arrangement); ''Chronicles'' would be ported to Steam in 2013 as ''Ys I & II Complete Plus''.
* '''Ys III: Wanderers from Ys''' (1989)
** Platforms: PC-88, PC-98, MSX2, Sharp X68000, Famicom, UsefulNotes/SuperFamicom, UsefulNotes/SegaGenesis, [=TurboGrafx-CD=], [=PlayStation=] 2,
** Eschewing the top-down bird's-eye view, ''Ys III'' is presented as a side-scrolling platformer, akin to ''VideoGame/ZeldaIITheAdventureOfLink''. Because of this, the Bump Attack system is removed; instead, a dedicated button for attacking is used. Other than rings replacing wands for magic spells, much of the game-play for ''Ys III'' remains the same as its predecessors.
** Taking place roughly three years after ''Ys II'', Adol and traveling companion Dogi return to the latter's hometown of Redmont in Felghana, ruled by Count [=McGuire=]. Upon arriving, they discover monsters are threatening the townspeople, caused by the slumbering of an ancient demon, whom [=McGuire=] desires to awaken.
** [[VideoGameRemake Remade]] as '''Ys: The Oath in Felghana''' in 2005 for Windows, this version replaces the side-scrolling aspect in favor of the 3D game-play used in ''Ys VI: The Ark of Napishtim'', while expanding the original story and dungeons for further play. Like ''Ys I & II Chronicles'', a [=PlayStation=] Portable version was released in 2010 and a Steam release in 2012.
* '''Ys IV: Mask of the Sun''' (1993) and ''Ys IV: The Dawn of Ys'' (1993)
** Platforms: Super Famcom (''Mask of the Sun''), [=PlayStation=] 2 (''Mask of the Sun''), UsefulNotes/PCEngine (''The Dawn of Ys'')
** Using the same top-down format of ''Ys I'' and ''Ys II'', ''Ys IV'' returns to using the Bump Attack system. However, ''Mask of the Sun'' removes rings and wands in place of elemental swords that casts spells, while ''The Dawn of Ys'' retains magic via rings from ''Ys II''. Interestingly, ''neither'' of these titles were developed by Falcom directly: they only provided a plot outline laid out with its soundtrack still being done by the JDK Sound Team. Instead, ''Mask of the Sun'' was published by Tonkin House and Creator/HudsonSoft developed and published ''The Dawn of Ys''; the [=PlayStation 2=] port of ''Mask of the Sun'' was handled by Creator/ArcSystemWorks.
** The first {{Prequel}} in the franchise, both games occur a year before ''Ys III'', where Adol returns to Minea to catch-up with old friends, but departs for the land of Celceta after coming across a message in a bottle requesting help. The difference between ''Mask of the Sun'' and ''The Dawn of Ys'' with regards to plot is none of the events in Minea occur in ''Mask of the Sun'': Adol immediately leaves for Celceta, while he stays in Minea for a while in ''The Dawn of Ys''. The "Romun Empire" is introduced in these games, another group of antagonists that make recurring appearances throughout the franchise.
** Both games were compiled and developed directly by Falcom as VideoGameRemake '''VideoGame/YsMemoriesOfCelceta''', released for the [=PlayStation=] Vita in 2012, displacing ''Mask of the Sun'' and ''The Dawn of Ys'' in the series' {{Continuity}}. Furthermore, ''Memories of Celceta'' borrows from the combat utilized in ''Ys SEVEN'', while refining its three-character party system, alongside new mechanic "Flash Move", where dodging an enemy attack right before it hits temporarily slows all enemy movement down (akin to "Witch Time" in ''VideoGame/{{Bayonetta}}'').
* '''Ys V: Lost Kefin, Kingdom of Sand''' (1995)
** Platforms: Super Famicom, [=PlayStation 2=]
** Like ''Ys III'', ''Ys V'' preserves the dedicated attack button rather than use the Bump Attack system, while introducing jump and defending with a shield mechanics, all in the classic bird's-eye view perspective. Magic is overhauled, where higher level spells can only be cast by holding down the button, and seperately leveled up rather than simultaneously with physical skills.
** In search of more adventure, Adol hears of the lost city of Kefin, having vanished from five hundred years ago, and seeks out the reason for its disappearance by heading to the desert city of Xandria. Whereas prior games were set on the continent of Eresia, Xandria is located on the southern continent of Afroca.
** Due to player complaints of ''Ys V'' being deemed "too easy", Falcom [[UpdatedRerelease re-released]] the game as ''Ys V Expert'' in 1996 with increased difficulty, published by Creator/{{Koei}}. The [=PlayStation=] 2 port was developed by Arc System Works instead, published by Creator/{{Taito}}.
* '''Ys VI: The Ark of Napishtim''' (2003)
** Platforms: Windows, [=PlayStation 2=], [=PlayStation=] Portable
** The first ''Ys'' title to use 3D graphics extensively, ''Ys VI'' presents characters, monsters and some bosses via pre-rendered sprites, while larger bosses are full 3D[[note]]The [=PlayStation=] 2 port uses 3D models for everything[[/note]]. This installment builds and refines on the previous games of a top-down view (''Ys I''), elemental swords combat and magic (''Mask of the Sun'') and jump mechanics (''Ys V''). Of note is Creator/{{Konami}}, the developer and publisher for the [=PlayStation 2=] and [=PlayStation=] Portable ports in 2005, dropped "VI" in the game's title.
** Adol is attacked by a Romun Empire navy in the Atlas Ocean while traveling aboard an allied pirate ship some time after the events of ''Ys V''. Its crew steers into the "Vortex of Canaan" maelstrom, throwing Adol overboard, washing him ashore on the nearby Canaan Islands. He discovers there's no way off these islands unless the Vortex surrounding it stops, pressing him to unlock the mysteries and secrets behind this phenomenon.
* '''Ys Origin''' (2006)
** Platforms: Windows, UsefulNotes/PlayStation4, [=PlayStation=] Vita
** The first game where Adol is not present at all[[note]]Except in TimeAttack and arena modes[[/note]], ''Ys Origin'' is also the first game where three different characters serve as the protagonist, each with different point-of-view takes to the overall plot, alongside distinctive combat skills and play-style. An "expansion disc" featuring new difficulties, an arena mode, alternate versions of the three protagonists with upgraded skills and the ability to play as Adol in non-story modes with additional secrets was available after launch; the 2012 Steam version includes all content. Finally, the [=PlayStation=] 4 and [=PlayStation=] Vita ports were released in 2017.
** The most distant {{Prequel}} in the franchise, ''Ys Origin'' is set seven hundred years before ''Ys I'', detailing the nature of Ys and the twin goddesses, but also the genesis behind the Clan of Darkness and their motivations that led into the first game. Players take on the role of three characters:
*** Yunica Tovah, granddaughter to one of the priests of Ys, and the ancestor to a side-character from the first game. Her play-style is reminiscent of Adol's from ''Ys III: The oath in Felghana'' and ''Ys VI: The Ark of Napishtim'', except she uses AnAxeToGrind.
*** Hugo Fact, a magic user who launches magic bolts with help from a pair of AttackDrones.
*** "The Claw", a white-haired warrior who works for demons wielding WolverineClaws.
* '''VideoGame/YsSEVEN''' (2009)
** Platforms: [=PlayStation=] Portable, Windows
** ''Ys SEVEN'' is the first game to introduce multiple playable characters who can form a party of upwards to three - players control the leading member, while the AI controls the other two. Rather than elemental weapons used in order to determine damage dealt, ''SEVEN'' switches to the type of weapon wielded via "slashing", "striking" and "piercing" attributes. Furthermore, each character has his or her different assortment of attack skills that can only be used if a skill meter is filled by attacking enemies. Finally, blocking enemy attacks at the right moment called "Flash Guard" nullifies damage taken, but also guarantees a CriticalHit for the next attack. Oddly, ''Ys SEVEN'' had an earlier PC release in 2012, but was only available in China; its Steam release was released at the end of August 2017.
** Deciding to find more adventure, Adol and Dogi head to the capital city in the Kingdom of Altago six months after the events of ''Ys VI''. Despite being thrown into jail for stopping the army from harassing citizens, the duo's reputation from the previous games leads the king of Altago into requesting their help with regards to strange earthquakes that have been occurring with much frequency.
* '''VideoGame/YsVIIILacrimosaOfDana''' (2016)
** Platforms: [=PlayStation=] Vita, [=PlayStation=] 4, Windows
** Building on the game-play from ''Ys SEVEN'' and refined by ''Ys: Memories of Celceta'', ''Ys VIII'' features the same combat and party mechanics, but with a new "Break" status, where enemies hit with an attack which they are weak to causes them to become weak to all attributes. Due to story-events, the game includes a {{simulation|game}}-based aspect, where players will build and upgrade a settlement with added TowerDefense elements. Although the [=PlayStation=] Vita version was released first in Japan during 2016, a worldwide release was set for the [=PlayStation=] 4 and Vita platforms in September 2017[[note]]The PC version, unfortunately, has been delayed indefinitely[[/note]], [[MilestoneCelebration coinciding with the franchise's 30th anniversary]]. Finally, rather than long-time partner XSEED Games, [[Creator/NipponIchi NIS America]] took over publishing duties for this release.
** When Adol is shipwrecked traveling from Xandria back to the Eresia mainland by a giant sea creature immediately after ''Ys V'', he wakes up on the unfamiliar Isle of Seiren in the Gaete Sea, alongside other passengers from their ship "Lombardia". Trapped on this uncharted, uninhabited place, Adol must work with his newfound companions to survive and find a way off the island; meanwhile, he begins having dreams about a blue-haired woman called Dana, who has a connection to this place, and the horrible curse behind it. While Adol is the primary protagonist of the game, the story occasionally switches perspectives to Dana, who serves as the {{Deuteragonist}}.

SpinOff installments in the ''Ys'' franchise are:
[[hardline]]
* '''Ys Strategy''' (2006)
** Platforms: Nintendo DS
** A FourX RealTimeStrategy installment, the first ''Ys'' SpinOff was developed by Future Creates and published by then-Marvelous Interactive (currently Marvelous Entertainment) in Japan, and is the second game to not include Adol. In a twist, Australia and Europe received a localization by publisher Rising Star Games, but left North American audiences no access to a version.
* '''Ys vs. Sora no Kiseki: Alternative Saga''' (2010)
** Platforms: [=PlayStation=] Portable
** Building on similar MassivelyMultiplayerCrossover {{Fighting Game}}s like ''Franchise/SuperSmashBros'' and ''VideoGame/FinalFantasyDissidia'', ''Ys vs. Sora no Kiseki'' allows players to choose a character to participate in two-to-four player battles against other characters through {{Competitive|Multiplayer}} or CoOpMultiplayer. Characters available in the crossver include:
*** ''Ys I'': Adol, Dogi
*** ''Ys III'': Chester
*** ''Ys VI'': Geis
*** ''Ys Seven'': Elk, Mishera, Aisha, Cruxie
*** ''VideoGame/TheLegendOfHeroesTrailsInTheSky'': Estelle Bright, Joshua Astray, Tita Russell, Agate Crosner, Olivier Lenheim, Klose Rinz, Renne, Leonhardt
*** ''VideoGame/ZeroNoKiseki'': Lloyd Bannings

There are also manga adaptations of ''Ys I'', ''Ys II'' and ''Ys IV'', though they diverge from the games considerably, including an eleven-episode AnimatedAdaptation of ''Ys I'' and ''Ys II''. There are also a series of novels based on the games, as well as two side-stories with no game equivalents: ''Record of the Destroyed'', set between ''Ys II'' and ''Ys IV'', and ''Crusade of Blood and Sand'', set immediately after ''Ys V''. Of course, none of these are available in English, except for the OVA versions of ''Ys I'' and ''Ys II''.

Last but not least, the [[AwesomeMusic/{{Ys}} music itself]].

Not to be confused with the second music album of the same name by Music/JoannaNewsom, nor is the series based on the [[Myth/CelticMythology mythological city of Ys]] (or Ker Ys), though the game does take its namesake from the myth.
----
!!This series contains examples of:

* AGodAmI:
** The goal of most major villains in the series.
** In general, the Eldeen attitude towards humanity, though most of them are benevolent like Alma, [[spoiler:Feena and Reah]].
* AbusiveParents: [[spoiler:Cain Fact]].
* ActionGirl: Karna in all versions of ''Ys IV'', Yunica Tovah in ''Origin'', [[RoyalsWhoActuallyDoSomething Aisha]], who fights with bows along with her teacher [[GuestStarPartyMember Sigroon]], and later in the game the melee fighter [[spoiler:Cruxie]] in ''Ys SEVEN'', and Calilica and Frieda in ''Ys: Memories of Celceta''.
* AdaptationDistillation: The OVA version of II tightens things up considerably and adds a few interesting elements like a twist on the in-game reliance on magic.
* AdaptationDyeJob: In the original version of ''Wanderers From Ys'', Elena & Chester had bright blond hair and blue eyes with ''maybe'' a hint of purple in the art (though generally not ingame due to palette restrictions of the era's hardware). In ''Oath in Felghana'', they're now flaxen-haired, notably fairer in complexion than any other Redmont residents (or nearly anyone else in the ''franchise''), and they now have ''prominent'' [[PurpleEyes violet eyes]], which were also basically unique to them [[note]](until ''Memories of Celceta'' came out and introduced a few more characters with that eye color)[[/note]]. This might be a bit of {{Foreshadowing}} on the artists' part to hint at the fact that [[spoiler:they're originally from Genos Island]]. The new coloration has been carried forward into every appearance the Stoddart siblings have made since, most obviously ''Ys Vs. [[VideoGame/TheLegendOfHeroesTrailsInTheSky Trails in the Sky]]''.
** The "violet thing" has become so prominent that in the [[http://isu.wikia.com/wiki/File:05.jpg Ys Heroines Calendar]] bonus for ''Celceta'', violet is even Elena's signature color.
* AerithAndBob: Lots of towns feature characters with a mishmash of European-sounding names with a couple oddballs thrown in. For example, Xandria in ''Ys V'' features Neina and Rije.
** Although [[spoiler:Neina isn't from Xandria...]]
** ''Ys: The Oath in Felghana'' is better about this. Characters other than villains (aside from Count [=McGuire=] having a real last name) tend to have normal names such as the sibling duo of Elena and Chester, Mayor Edgar, and even a miner who has recently [[spoiler:been mistaken to have]] died in a mining accident named Bob.
** ''Ys SEVEN'' gives us two sibling characters. The older one is a young man named Mustafa -- a real Arabic name and thus one that works for someone from a location based on part of North Africa. His younger sister, Cruxie, however, has a name that doesn't sound like something someone from North Africa would have.
* AIIsACrapshoot: [[spoiler:The titular Ark of Napishitim in ''Ys VI'' goes insane and tries to destroy all civilization in Eresia once the control key Almarion is broken.]]
* AllThereInTheManual: Perfect Data of Ys contains a whole lot of interesting information about the world. The plotline for ''Ys SEVEN'' has been hinted at for at least a decade quite literally in manuals and the loading screen of ''Ys Eternal''.
* AllYourBaseAreBelongToUs: Several of the games have their main town occupied by the enemy at some point and/or the residents captured. ''The Oath in Felghana'' has the town of Redmont attacked instead of occupied with everyone getting close to losing hope, but things get better when Dogi's trainer, Berhardt, gets everyone's spirits up and has the women and children take shelter while the men heavily guard the town, complete with more upbeat music starting up.
* AloofBigBrother: Toal to Hugo in ''Ys Origin''. [[spoiler:In Toal's route, it becomes obvious that Toal cares a lot about Hugo beneath that aloofness.]])
* AmericanKirbyIsHardcore: [[http://static.tvtropes.org/pmwiki/pub/images/ys3-genesis.jpg This]] is American box art for ''Ys III'' for UsefulNotes/SegaGenesis. Just compare Adol with the picture above. The [[http://www.gamefaqs.com/snes/562845-ys-iii-wanderers-from-ys/images/box-28816 SNES version]] and the [[http://img.gamefaqs.net/box/1/8/8/20188_front.jpg TurboGrafx-CD version]] (the latter of which depicts Genos instead of Adol) aren't quite as bad, especially since the SNES version doesn't end up making Adol look like some sort of barbarian, though they still ditch the anime look the series is known for.
* AnachronicOrder: The order the games were released is not the order in which they occurred - chronologically, events in the franchise (released up to 2017) begin with ''Origin'', ''I'', ''II'', ''Memories of Celceta'', ''The Oath in Felghana'', ''V'', ''VIII'', ''VI'' and ends with ''SEVEN''.
* AnAxeToGrind: Yunica Tovah wields a battleaxe in ''Origin''.
* AndManGrewProud
* AndThenWhat: Dogi asks this of Chester after learning his motivations for collecting the four statues in ''Oath''. [[spoiler:Dogi wonders what Chester's going to do after he's gotten his revenge, and if it'll be worth it. Chester briefly falters, but announces that [[IveComeTooFar he's come too far to turn back]] and stabs Dogi.]]
* AntiGrinding: The amount of XP granted from a given enemy is a function of the monster's level relative to Adol's level. After a while, defeating a monster will only yield 1XP, with hundreds or thousands needed to level up. Most versions of ''Ys I'' also have a 10 level cap that is maxed out so quickly that there's usually no point in grinding (even without trying, you'll end up within one level of reaching it by the time you find the third book of six).
* AntiHero: Geis.
* AntiVillain: [[spoiler:Sister Nell Dularn in ''Oath''. She follows Garland's orders out of gratitude for saving her life and genuinely feels remorse for her actions. When she is defeated by Adol for the last time, she even thanks him and asks him to save Elena before dying.]]
* ApocalypseHow: A Class 2 occurred centuries before the collapse of Ys, which itself was a Class 1. The Eldeen's continent was destroyed by unknown means, scattering humanity, demi-humans/beastmen, and a small fraction of Eldeen to the Eresian lands.
** ''Lacrimosa of Dana'' has ''four'' [[spoiler:Class 3a]] events happen in its backstory; with only one survivor for each event. None of these events happened in the era of humanity.
* AristocratsAreEvil: Count [=McGuire=] in ''The Oath in Felghana''. Chester actually refers to him as ''Lord'' [=McGuire=]. [[spoiler:Turns out he was being manipulated by Garland.]]
* ArtEvolution: The series's art style varies between games, though one example of a change in art style is ''Ys SEVEN'' having Adol and Dogi looking older than in the first game (which they both debuted in), but since several years passed between those games, it actually makes more sense than a lot of examples of the trope and ends up being less noticeable. Notably, ''Ys I & II Chronicles'' introduces new in-game artwork different from the ''Eternal'' / ''Complete'' versions ''Chronicles'' is based on while also including an option to use the artwork from those versions.
* ArtifactOfDoom: [[spoiler:The Black Pearl, which was really the SealedEvilInACan for Darm, formerly Cain Fact.]]
** The four statues that house the power of Galbalan in ''Oath'' count as well.
** [[spoiler:The philosopher's stone in ''Ys V'' also is said to bring destruction to lands around it.]]
** Interestingly, the Black Pearl, despite its association and color, [[DarkIsNotEvil was originally benevolent]]. It was only after being corrupted that the Black Emelas drawn from its use created demons.
* ArtifactTitle: Many of the games in this series have no connection to Ys itself. However, Eldeen artifacts and history have been scattered across the known world, causing similar events that doomed Ys to repeat.
* ArtificialBrilliance: Higher level demons will sometimes actively dodge when Adol comes charging in to attack in the Steam, PSP, iOS, and Android versions of Ys II.
* ArtificialGill: Grattheos' Talisman allows Adol and his party to breathe underwater in Ys VI and VII.
* ArtificialStupidity: Some demons in ''Ys: Origin'' who use ramming attacks against the player character sometimes charge and then fall into a hole going to the floor below.
* ArtisticLicenseEngineering: Rado's Annex (a two-story tower that is connected to the 16th floor of Darm Tower by a bridge that is only anchored to the ground on one side) is pretty much structurally impossible. Yunica actually [[LampshadeHanging points this out]] when she first sees it in ''Origin''.
* AscendedExtra:
** Dogi, the Wall-Crusher! Witness how in ''Ys I'', he's little more than a guy who busts Adol out of prison... never appears In Ys II, and in ''Ys III'' (as well as its remake, ''The Oath in Felghana''), he's Adol's only friend and travelling companion, implying they've met before the first game. This got to a point where he's playable in ''SEVEN'' (and the first member of Adol's party, for reasons made obvious in ''Ys III'' and ''The Oath in Felghana''), in which he pilots a boat under the name of Dogi the Wave-Crusher.
** Each of the playable characters in ''Origin'' can be considered this from the perspective of the other routes.
** Also, in ''Oath in Felghana'', Dularn and Garland. In the original ''Wanderers'', both barely counted as characters (Dularn got ''one line'', if that, depending the version). In ''Oath'', both have vastly expanded roles. Specifically, [[spoiler: as ''Sister Nell Dularn'' and ''Bishop Nikolas Garland''. Nell's both a presence in town and stalks you as "Dularn" throughout most of the game, and Garland does a great job fooling everyone before showing his true colors.]]
* AscendToAHigherPlaneOfExistence: [[spoiler:The fate of twins Feena and Reah]] at the end of Ys II, [[spoiler:Eldeel]] in ''VideoGame/YsMemoriesOfCelceta'', and [[spoiler:Alma]] in ''Ys VI''. The Eldeen just can't seem to stick around, it seems.
* ATasteOfPower: In ''The Dawn of Ys'', Adol starts with the best equipment from the (chronologically) previous game. With it he can one-hit kill everything and nothing can really hurt him. Naturally, he loses it very quickly and doesn't get it back until much later. In ''Lacrimosa of Dana'', Adol still has his Isis Blade from the previous game, but only uses it during the first boss battle, whereupon it gets lost at sea.
** [[spoiler: Hugo in ''Origin'', but that turns out ''very'' badly until he gets some unlikely help.]]
* {{Atlantis}}: The 'Atlas Continent' [[spoiler: which is the home of the Eldeen civilization and the birthplace of Feena and Reah]]. To a lesser extent, the titular Ys.
* TheAtoner: Berhardt was once a mercenary involved in the genocide of Genos Island, but he quit and raised the Stoddart children because he could not kill children.
* AutobotsRockOut: Not just for boss fights, either. The franchise's collective soundtracks as a whole have a rather disproportionate number of rock tracks for a medieval fantasy series.
* AwesomeButImpractical: The life drop in the [=TurboGrafx-CD=] version of Ys II. It allows you to resurrect yourself with full life and magic if you get killed while this is equipped. On the early bosses when you could really use this because they could OneHitKill or seriously hurt Adol, it is too expensive at 60,000 gold. When you can finally afford it, you have levelled up enough that most bosses at this stage other than Darm are no threat if you are a good player. Against Darm, you must have the Goddess's Ring equipped or you will get quickly killed because his attacks are too fast to dodge without the ring, so you cannot have the life drop equipped. If you have the life drop equipped in this battle, you will get killed twice very quickly. The Steam version allows you to equip one item that generates a constant effect while equipped and one consumable, so both the Godess's Ring and the elixir (as it is known in this version instead of the life drop) can be equipped.
* AnAxeToGrind: Some members of the Clan of Darkness can use battle axes.
* BackFromTheDead: [[spoiler: Chester in ''[[IntercontinuityCrossover Alternative Saga]]''.]]
* BadFuture: Inverted -- ''Origin'' shows Esteria's bad ''past''. The surface below Ys has craggy rocks, lava flows, and noxious gas everywhere, except near the Roda Trees, which are essentially oases of lushness in the ruined land. Contrast how it looks 700 years later when Adol arrives, when the surface had recovered and become a small country called Esteria whose fields are lush and has a port town by the ocean, and some descendants of the priests of Ys live there, with Goban (a Tovah descendant) assisting with Adol's raid on Darm Tower and Luta Gemma assisting with the same thing within the tower. In addition, after Adol visits Ys and finishes his journey there in the second game, [[spoiler:Ys returns to the surface, reuniting Ys with Esteria]].
* BadassNormal: Adol again. There's nothing obviously supernatural about him, he's just a dude who decided to wander a bit, and yet he pretty much [[VideoGame/GhostbustersTheVideogame eats gods for breakfast]] as a ''living''. And even though he can use magic in some games, it's always for plot-related reasons (such as the bracelets in ''The Oath in Felghana'') and not innate ability (as we said, there's nothing obviously supernatural about him), and he loses it after the journey's over. His best friend, Dogi, is pretty much a BadassNormal as well.
** In ''Origin'', Yunica Tovah also has no innate magical abilities and requires her axe to fight until, like Adol, she gains magical artifacts that make up for it.
* BadassFamily: The Fact family and the Clan of Darkness are this and BigScrewedUpFamily.
* BadassInDistress: This has happened to Adol and Dogi.
** Adol often gets captured or arrested. He either needs to be rescued or is released when a reasonable government realizes that it has arrested the wrong person for a crime.
** Chester stabbed Dogi in ''The Oath in Felghana'', requiring Berhardt to nurse him back to health.
* BadassPrincess: Aisha in ''VideoGame/YsSeven''.
* BadPowersGoodPeople: Several good characters use magic which is fueled by the Black Pearl which is made of black emelas, which generates demons when it is used by anyone not made up of white emelas. This variety of magic is therefore BlackMagic.
* BagOfSpilling: Adol tends to lose pretty much all his equipment and level in between adventures; somewhat [[JustifiedTrope justified]] in that he tends to get in massive shipwrecks to start each adventure.
* BalefulPolymorph: In older versions of ''Ys IV'', Bami's favorite hobby is to transform humans into monsters (she simply uses mind control in ''Memories of Celceta''). This includes Adol. Dalles did it at least once himself.
* BallOfLightTransformation: ''Ys II'':
** At the beginning, Adol assumes this form during his flight from Darm Tower to Ys.
** The goddesses do this when they AscendToAHigherPlaneOfExistence at the end, leaving their physical forms behind as statues.
* BeardOfEvil: [[spoiler:Cain Fact]] in Origin.
* BeefGate: The Abandoned Mine in ''Ys I'', the area beyond the barricade on Quatera in ''Ys VI'', etc, as well as many bosses. When they tell you "don't go there until you're strong enough", they ain't kidding.
* {{BFS}}: Almarion, the Black Key, and The Tovah family's Crimson Lotusblade.
* BigBad
** ''Ys I'': Dark Fact
** ''Ys II'': The Black Pearl / Darm
** ''Ys III''/ ''Ys: The Oath in Felghana'': Galbalan
** ''Ys IV: Mask of the Sun'': Eldeel
** ''Ys IV: the Dawn of Ys'': Arem
** ''Ys: Memories of Celceta'': [[spoiler:Gruda]]
** ''Ys V'': Jabir
** ''Ys VI'': Ernst
** ''Ys Origin'': [[spoiler:Darm / Cain Fact]]
** ''Ys SEVEN'': [[spoiler:Tialuna]]
* BigDamnHeroes: The [=NPCs=] of the search party, in the final section of Darm Tower in ''Origin'', unless you [[spoiler: play as Toal, in which case they show up for three previous bosses but are conspicuously absent when Toal confronts Dalles and Cain.]]
* BigNo: [[spoiler:Toal, when the goddesses go to sleep.]]
* BigScrewedUpFamily: Look no further than the Fact family. The Stoddart family in ''[=III/Oath=]'' isn't much better. The Clan of Darkness also counts, with some members wanting to become all-powerful and take over everything, other members trying to atone for their ancestors' crimes and therefore getting into conflicts with the first group, and at least one member doing a HeelFaceTurn.
* {{Bifauxnen}}: Karna in ''The Dawn of Ys''. Subverted in ''Memories of Celceta'' where she looks decidedly feminine.
* BishonenLine
* BlackMagic: Ys has several instances of this trope.
** All magic in Ys I, II, and Origin is this because it is sourced from the Black Pearl. Whenever the Black Pearl and other artifacts made of black emelas are used as a source of magic by anyone other than beings made of white emelas like the Eldeen, demons are generated as a side effect.
** The Philosopher's stone in Ys V is powered by human sacrifices.
* TheBlacksmith: Ys II features a blacksmith who is initially out of work because he is out of iron ore. The mine that has some iron ore is full of demons, so the miners require good armor and weapons to kill the demons in order to mine. Unfortunately, the armor and weapons shop has only weak armor that is too weak for the miners who are not [[MasterSwordsman master swordsmen]] to survive due to the lack of iron ore needed to make the iron that the armor requires to be made. Furthermore, Velagunder, a giant demon, guards the iron ore in the mine. This demon is vulnerable only to [[KillItWithFire fire magic]] and is invulnerable to physical attacks in this game. Adol has to go into the mine with a sword, a shield, the ability to use Ys's magic, and weak armor to kill Velagunder and to get the iron ore to break this cycle.
* BladeOnAStick: These weapons are the weapons of choice for members of the Clan of Darkness. Examples include Geis in ''Ys VI'' and ''Ys SEVEN'', Kishgal in ''Ys Origins'', and Frieda in ''Ys: Memories of Celceta''.
* BlindIdiotTranslation: There are many instances.
** Falcom's own official romanization for the Fact family is Fukt. Feel free to start laughing any time.
** The DS version of ''Ys I & II'' translates the name of the Shrine of Solomon (that being the translation used in Creator/XSEEDGames's translation of the PSP version, previously worded as Solomon Shrine in the [[UsefulNotes/TurboGrafx16 TurboGrafx-CD]] version) as Palace of Salmon. One implies wisdom. The other implies fish. The weird thing is that Atlus USA did the DS version's translation and didn't do terribly bad with the rest of the game, but Atlus and XSEED Games both try to go for natural-sounding English text in their translations (and not just for Ys), with XSEED being the one to do so with its translation. A similar translation shows up with [=DotEmu=]'s iOS and Android ports of Ys Chronicles II when the title card for the Shrine of Solomon shows because these versions use the Japanese title cards which shows the Japanese on top and Falcom's own English translation of the place name below the Japanese with the English title being the Shrine of Salmon. This is despite the fact that [=DotEmu=] used XSEED Games's localization for the English version's other text in Ys Chronicles II.
** The same localization as in the item above also shows that Falcom's internal Romanization of "roo" is "loo", but these [[FunnyAnimal funny animals]] are not toilets so most English localizations translate this word into "roo".
** Falcom's initial English title for ''Ys: Memories of Celceta'' was ''Ys: Foliage Ocean in Celceta'', despite the fact that its Japanese title can be neatly translated as ''Ys: Celceta, the Sea of Trees''.
* BloodKnight: Kishgal in ''Origin''.
* BoisterousBruiser: Dogi, the Wall-Crusher!
* BonusBoss: Several in 3D Ys games.
** Including the [[NighInvulnerability Nigh-invulnerable]] Majunun, which is kind of an über-BossInMookClothing. Its attacks kill you instantly the first time you are able to reach it.
* BossRush: An extra featured in ''I/II Chronicles'' and ''Oath in Felghana''; surprisingly absent from ''SEVEN'', however.
** [[ThatOneBoss The Black]] [[KillerRabbit Pikkard]] is essentially a BossRush ''in'' a boss fight, pitting you against three elite mooks and then the Black Pikkard itself.
* BossSubtitles: In the Japanese versions of the games, glorious {{Engrish}} subtitles began with ''Ys VI'' and continued in ''Oath'' and ''Origin'', giving us such wonders as 'Garland -- Mind Broken of the Darkness'. The accompanying Japanese subtext tended to make a lot more sense but wasn't half as fun. ''Ys SEVEN'' has only Japanese titles. XSEED Games's localizations translate these properly, and had fun with at least one in ''SEVEN'', with one boss having the subtitle [[AddedAlliterativeAppeal "big bug beast"]].
** Falcom actually started doing this with ''Ys Eternal'', where the titles all went "[Boss Name] -- [Ys Priest Name]'s Redemption of [Priest's power]". This was dropped in ''II Eternal'' and removed from the original entirely in ''Chronicles''.
* {{Bowdlerise}}:
** Zalem wears {{Stripperific}} clothing in the original [[UsefulNotes/PC88 PC-88]] version of Ys II, but was given a conservative robe for the North American [[UsefulNotes/TurboGrafx16 TurboGrafx-CD]] version.
** In the same release, the fortuneteller Sarah was strongly implied to have died as the antagonists discovered [[HeKnowsTooMuch she knew too much about their plans]], so she writes a letter to tell Adol the details before she's found. In the localization, she was said to be kidnapped, leading to a WhatHappenedToTheMouse situation as she's still never accounted for in any enemy strongholds.
** blood effects are removed from console versions of Ys VI published by Konami to get a lower rating from many video game rating and censorship bureaus.
* BrainUploading: The Eldeen were said to have created new bodies out of white Emelas in the distant past to host their minds in stronger, purified bodies. Once they were able to have children in these forms, the Eldeen species became immortal.
* BreakMeter: Enemies that are hit with a large number of attacks at once can be stunned in ''VideoGame/YsSeven'', ''VideoGame/YsMemoriesOfCelceta'', and ''Lacrimosa of Dana''; the latter also has a separate weakness break, where striking enemies with their attack weakness will eventually render them vulnerable to all weapons.
* BrokenBridge: Some demons that guard a chest containing a critical item were changed from a BeefGate where you had to be at least level 6 in the original Ys II in order to damage the stone demons guarding a chest to requiring a long sword or stronger sword in order to damage these demons in the [[UsefulNotes/TurboGrafx16 TurboGrafx-CD]] version since levels carried over from Ys I.
* BrownNote: The music in the Devil's Corridor in Darm Tower in both Ys I and Ys Origin will kill the player character if that character does not either neutralize the music or escape in a short amount of time.
* ButNowIMustGo: Adol is the king of this trope. Most often, he'll leave behind some maiden who's obviously fallen for him standing on a dock, watching him go. Also, [[spoiler: the twin goddesses]] at the end of Ys II.
* CallBack: In terms of release order, not chronological order (considering it's the first chronologically) ''Origin'' is loaded with them, such as the fact that the setting is Darm Tower.
* CannonFodder: Romun Empire soldiers in Ys IV: The Dawn of Ys are given the weakest equipment in the game.
* CanonDiscontinuity: It's generally agreed that outsourced versions of the games not handled by Falcom themselves are considered non-canon (despite some fans considering the Creator/HudsonSoft-produced PC Engine ports to be the definitive renditions of the first few games). The only exception to this is the Super Famicom version of the fourth game (which was not directly developed by Falcom), at least until an internally developed version was made years later. ''Ys VI'' confirms the original (by a month) Tonkin House-developed Super Famicom version, ''Mask of the Sun'', canonical over ''The Dawn of Ys'' (which allegedly deviated from Falcom's treatment). Remakes of the game (including the Falcom-made ''Memories of Celceta'') also follow ''Mask of the Sun''.
* CanonImmigrant: Several characters and locations hinted at in manuals or introduced in the OVA made their way into the games proper with the release of ''Ys Eternal''.
* {{Cap}}: With the exception of the [=TurboGrafx-CD=] version, which has a 62-level cap in both ''Ys I'' and ''II'' with the endgame level and experience of ''I'' carrying over to ''II'', ''Ys I'' typically has a 10-level cap which you'll reach long before the final dungeon. That the enemies keep getting stronger while Adol doesn't aside from some new equipment is the main source of difficulty in the game's second half. Ys II has a much more reasonable 52-level cap.
* CantDropTheHero: Played straight in ''SEVEN'' due to plot reasons; averted in ''Memories of Celceta'' and ''Lacrimosa of Dana''.
* ChaosArchitecture: Darm Tower is described as having constantly shifting floors by one member of the search party in ''Ys: Origin''.
* ChasteHero: Adol. One can even say Adol is a CelibateHero since his job description says, "After saving beautiful women and making them swoon all over for you, leave for another adventure."
** The TG-16 version of ''Ys II'' may be the only game in the series where he goes so far as to kiss one of the girls.
* ChekhovsGun: The [[spoiler:broken sword]] in ''Ys Origin''.
* CheckPointStarvation: In the VeryDefinitelyFinalDungeon of ''VideoGame/{{Ys}} V'', you have to fight three very tough bosses, with no save points in between. Unlike previous games where you could save anywhere, this one only allows you to save at inns in town.
* {{Chessmaster}}: [[spoiler: Garland]] in ''Oath''. Also [[spoiler: Cain Fact]] in ''Origin''
* ChickMagnet: Adol. Hugo too, to an extent.
* TheChosenOne: Adol is a rare combination of this and TheUnchosenOne. In most cases, TheChosenOne becomes badass because they were chosen. Adol, by contrast, didn't even [[JumpedAtTheCall Jump At The Call]] -- he set out looking for calls. In the OVA of ''VideoGame/{{Ys}} I'', it turns out he has the same name as the prophesized hero, but this is [[LampshadeHanging Lampshaded]] when the seer's superior reminds her that Adol Christin is a common name and the last one that came to town was a little girl. It turns out that the prophecy is in fact talking about him, but instead of him becoming a hero because he was chosen by the prophecy, it just correctly predicted that he'd show up and save the place. Adol's reputation begins preceeding him ''as early as the first game''. It's generally because of who he is and what he's done that he's given any powers or ancient artifacts that he doesn't get himself -- if you need a hero to save your land, it's only sensible to choose someone with job experience. In the sixth game, the daughter of Alma running the trials is not impressed with this random man who just showed up out of nowhere, but after he begins passing them, she asks around about who this 'Adol Christin' guy thinks he is. She grows ''much'' more impressed and respectful after that.
* ChristianityIsCatholic: Felghana's monotheistic religion, which as pointed out below is centered around a benevolent deity referred to as {{God}} rather than a CrystalDragonJesus, seems very much like the Ys world's equivalent of Catholicism, since it has priests, nuns, bishops, etc.
* ChronicHeroSyndrome: Adol. An interesting case where the ChronicHeroSyndrome isn't because he can't say no when someone's in trouble and keeps running into problems, but a deliberate lifestyle choice by a character who set out to look for problems and people in need of saving. He's far less hapless than most examples of the trope.
* TheClan: The Clan of Darkness. Evil members of this clan have become one of Adol's two recurring enemies. While this clan spawns several enemies, it also has spawned several allies and friends that Adol works with.
* ClimaxBoss: Vagullion in ''I'', Zava in ''II'', Gildias in III, Chester in ''Oath'', Gadis in ''Dawn'', [[spoiler:Eldeel]] in ''Memories of Celceta'', Dorman in ''V'', Orjugan in ''The Ark of Napishtim''.
* ClippedWingAngel: Arem's final BlobMonster form in ''The Dawn of Ys'' ("mind-numbingly easy" according to the Website/GameFAQs walkthrough by Deuce, who translated the text for the fan translation).
* ClockTower: [=McGuire=] built one in Valestein Castle with the obscene taxes he levied in order to impress his wife.
* ClockworksArea: Adol has to climb the insides of a ClockTower while dealing with a ZombieApocalypse in the area in ''Oath in Felghana''.
* CollisionDamage: Played straight and inverted in the earlier games -- Adol gets hurt when enemies hit him and enemies get hurt when Adol runs into them.
* ColonCancer: The first two games are titled ''Ys I: Ancient Ys Vanished: Omen'' and ''Ys II: Ancient Ys Vanished: The Final Chapter'', at least in the English translation of the recent PSP versions.
* TheComputerIsACheatingBastard: Enemies in ''Oath of Felghana'' are not affected by environmental hazards like moving poles that have spikes.
* ContinuitySnarl: ''Ys IV''. Even putting the (now resolved) two version problem aside, if ''Memories of Celceta'' also takes place before ''The Oath in Felghana,'' Adol should have very specific notes [[spoiler:on how to kill a Galbalan]] by the time he reaches Felghana, not to mention [[spoiler:a special anti-Galbalan sword]]....
* CorruptChurch: [[spoiler:If the Romun Empire's religion is not a ScamReligion, Bishop Nikolas Garland turns the church in Felghana into this.]]
* CriticalExistenceFailure: Enemies explode into LudicrousGibs when killed in the 3D games and ''Eternal'' remakes. Not Adol, though. Although enemies can "critical attack" you on Nightmare difficulty, possibly delivering a OneHitKill.
* CrystalDragonJesus: Subverted with the religion practiced in Felghana (and implied to be so elsewhere with the explicit mention of a Felghana diocese), as it is a monotheistic religion centered around a benevolent deity explicitly referred to as {{God}}.
* DarkIsEvil: Members of the Clan of Darkness who try to take over everything and become all-powerful are this.
* DarkIsNotEvil: Members of the Clan of Darkness who are trying to atone for their ancestors' crimes are this.
* DatingCatwoman: [[spoiler: Epona and Hugo]]'s relationship in the nutshell in ''Origin''.
* DeadpanSnarker: Hugo Fact in ''Origin'' tends to be one when talking to his enemies.
* DealWithTheDevil: The closest we get is [[spoiler:Hugo Fact accepting demonic essence from Dalles... and going mad]].
* DeathOfAThousandCuts: Some enemies have defenses against the entirety of some characters' attacks that these characters are forced to defeat such enemies with this strategy. A character can also intentionally use this strategy to fill up the experience multiplier meter if it is present in the game with weapons an enemy is strong against to level up quickly because that meter does not care about the quality of the hits as long as those hits deal at least ScratchDamage.
* DeathRay: Orjugan and Napishtim's second form in ''Ys VI'' and Gadis in ''Ys: Memories of Celceta'' use this type of attack.
* DefeatMeansFriendship: Adol's rival in ''The Ark of Napishtim'' and ''SEVEN'', Geis, joins the party in the latter after losing a duel. Of course, in this case it's more like "defeat means becoming willing to provide assistance in defeating a common enemy", since Geis was never terribly fond of Adol.
* DependingOnTheArtist: As the series has been running for three decades and across a huge spectrum of hardware, this has, unsurprisingly, cropped up. ''1&2'' tend to be particular examples due to how often they've been ported & remade.
** An especially notable example is Lilia - or specifically, Lilia's ''hair''. In many of the early releases, it seemed more reddish than anything - darker than Adol's flame-red, but still red. Some of the promo art from that period, though, gave her dark brown hair. These days she's more consistently a medium-brown.
* {{Determinator}}: Nothing can stop Adol from uncovering mysteries behind ancient ruins and destroying whatever abominations that were sealed in there.
* DiabolusExMachina: The Ark of Napishtim summons a tidal wave to wipe out Eresia; this is shortly after countered by a DeusExMachina.
* DidNotGetTheGirl: Normally, this is inverted, as in most games the female lead doesn't get the guy (as Adol leaves on another adventure). However, it is played straight in ''Origin''; in Hugo's route, he fails to get [[spoiler:Epona]], and in Toal's route, he fails to get [[spoiler:Reah]]. In both cases, it's because the girl isn't available for romance by the end of the game. This also arguably applies with Adol and Feena in ''Ys II''.
* DieHardOnAnX: The Shrine of Solomon in Ys II is one of these.
* DiedInYourArmsTonight: Twice in ''Origin''. [[spoiler: Roy]], in Yunica's route, and [[spoiler:Epona]], in Hugo's route.
* DisappearsIntoLight: [[spoiler: "Dularn" and Garland]] in ''Oath in Felghana'', [[spoiler:Ernst after his defeat]] in ''The Ark of Napishtim'', [[spoiler: Tialuna and the Five Dragons]] at the end of ''SEVEN'', and [[spoiler:Gruda after his final defeat]] in ''Memories of Celceta''.
* DiscOneFinalDungeon: The Abandoned Mine in ''I'', after which is the PointOfNoReturn and the EvilTowerOfOminousness that takes up the entire second half of the game. Also, the Moat of Burnedbless in ''II'', the Elderm Mountains in ''III'' (which features the last FetchQuest item), and the Xandria underground in ''V'', where you fight the ClimaxBoss, the OneWingedAngel of TheDragon, Dorman, and Ruins Island in ''SEVEN''.
* DistressedDamsel: Multiple cases, but the worst offender has to be Elena in ''Oath'', whom you have to rescue at ''least'' three times.
** [[BadassInDistress Adol himself qualifies]], getting captured or trapped and requiring Dogi to break him out of jail/a cave-in at least once per game.
** Reah and Feena each have to be rescued once in ''I, II'', and ''Origin'' (in each path).
* DoesThisRemindYouOfAnything: The English-language intro to ''The Ark of Napishtim''. "I'm Dogi, the Wallcrusher. Wanna get your walls crushed?"
* DoomedByCanon: [[spoiler:Toal's plan to keep the goddesses from needing to seal the Black Pearl by destroying it himself.]] In fact, this applies to all three routes of ''Origin'', because the demons aren't defeated permanently until Adol arrives 700 years later.
* TheDragon: Dalles to Darm in ''Ys II'', Garland to Galbalan in ''Ys III/Oath'' (and in Oath, Dularn explicitly serves as this to Garland), Eldeel to Arrem in ''The Dawn of Ys'', Gruda to Eldeel in ''Mask of the Sun'', Dorman and Rije to Jabir in ''V'', Admiral Agares to Ernst in ''VI'', [[spoiler:Scias to Tialuna]] in ''SEVEN''.
** DragonWithAnAgenda: [[spoiler:Gruda in all versions of ''Ys IV'', who was simply manipulating Eldeel in order to attain the ancient power.]]
* TheDrifter: Adol defines this trope.
* DropTheHammer: Calilica in ''Ys: Memories of Celceta''.
* DroneOfDread: "Pressure Road", the music for the final area in ''Ys II'', especially in ''Chronicles''. The fact that it's more cacophony than music makes it unsettling enough, but considering the fact that this is a series known for its vibrant soundtracks....
* DualWielding: In his second boss fight in Oath, Chester fights with both his original sword and the [[SwordOfPlotAdvancement Brave Sword]].
* DudeWheresMyRespect: Somewhat subverted since Adol becomes more popular as he goes through many adventures. However, that still doesn't stop lazy townspeople from asking him to do some menial tasks.
* TheDulcineaEffect: Adol for every single female in the series. [[spoiler:As with so many common series tropes, ''Ys SEVEN'' has a lot of fun with this one.]]
* DummiedOut: The mascot system in ''Ys II Chroniclles+'' for Steam was removed when it caused bugs with due to a conflict with Steam that caused crashes when screenshots were taken.
* EarlyInstallmentWeirdness: The American TG-16 release of ''Ys I & II'' referred to Dogi as "Colin". Subsequent US releases of the franchise ignored the change.
* EarnYourBadEnding: '''VIII's''' Bad Ending can only be feasibly attained if you ''actively'' go out of you way to be a dick to everyone by treating them poorly, refusing their side quests, refusing to defend the village during monster attacks etc, and given how the rewards for doing all of this range from handy to downright crucial, its almost impossible to get the Bad Ending unless you're actively hunting for it.
* EasterEgg: ''Ys I'' and ''II Eternal'' were ''loaded'' with these, ranging from a developer's room to fun but pointless tricks with various items to a cutscene that lets you check out Feena's measurements ([[spoiler:If you must know, 158-84-56-85, which translates to 5'2", B33" W22" H33.5"]]). Most of these were removed from the DS games that were combined and then released overseas as ''Legacy of Ys''. They were restored for Falcom's own handheld version, Ys I-II Chronicles for the PSP.
** In ''Ys: Memories of Celceta'', Misshy from the ''Trails'' series appears in various places. (This could possibly also qualify as a ShoutOut.)
* EasyModeMockery: Starting a game on the very easy difficulty of the North American and European version of the Windows version of ''Ys: The Oath in Felghana'' unlocks the achievement "More Like Adol the Yellow."
* ElementalPowers: Generally ignored until ''Ys VI'', even though several games possessed weapons that look elemental. ''SEVEN'' and ''Memories of Celceta'' have taken this trope even further with each playable character having his or her own element.
* ElementalRockPaperScissors: The harder difficulties of ''The Ark of Napishtim'' feature color-coded enemies, which can only be damaged with the same color sword, as well as the occasional black ones that are {{Invincible Minor Minion}}s.
** In ''Ys SEVEN'', ''Ys: Memories of Celceta'', and ''Lacrimosa of Dana'', you have blunt, slashing, and piercing weapon types. Some enemies are vulnerable to one while resistant to others.
* TheEmpire: The Romun Empire, which resembles the ancient Roman Empire, in Ys: The Oath in Felghana, Ys IV: Mask of the Sun, Ys IV: The Dawn of Ys, and Ys VI: The Ark of Napisthim. It is somewhat subverted in Memories of Celceta because Griselda, the local ruler from the Romun Empire, is an oddity who wants to stamp out corruption and hires Adol to map out the area. She declares the evil military officers as [[InsaneAdmiral rogue military officers]] that Adol and his party have to hunt down. It has become one of Adol's two main recurring enemies, the other being the Clan of Darkness, many of whom [[BreadEggsBreadedEggs take high-ranking positions in the Romun Empire to get the resources they need for their own plots]].
* EmptyRoomPsych: Quite a few areas exist purely to show off the pretty graphics and make players wonder what they're missing. Subverted with the empty room at the bottom of the mines in ''Ys I''. It's just an empty room at first, but in ''Ys II'', when the titular land is restored to its place, it becomes the doorway to the Core of Ys.
** Also, some of the dead ends in the mines in ''I'' and ''II'' make more sense once you realize that you're looking at two halves of what used to be one structure. In fact, both mines are named [[SpellMyNameWithAnS Rastin/Rasteenie]].
* EnemyMine: The Redhan Village and Port Rimorge are ready to go to war in Ys VI because the residents of Port Rimorge keep destroying ancient ruins that the Redhan Village do not want destroyed for building materials. However, they are united when a [[TheEmpire Romun Empire]] fleet attacks the islands and enslaves several Redhans. Baslam, the leader of Port Rimorge, hates the Romun Empire because it is trying to conquer his home country, Altago, and therefore [[PatrioticFervor helps the Redhans in order to strike at his homeland's enemy]]. Adol helps in this effort.
* EscortMission: Happens at least once in every game except ''Ys V''. Thankfully, most of them aren't that bad for the simple reason that the escortee will usually stick close to Adol. In Ys IV: The Dawn of Ys, the people you escort are badasses and will kill demons and Romun soldiers that are in their way without any problems, but they still can get killed by fire traps.
* EverythingTryingToKillYou
* EverythingFades: Even main characters' bodies fade or blink out of existence upon death. A notable example is Ernst in ''The Ark of Napishtim'', where his body seems to vaporize or sublimate.
** Averted when Adol kills Romun soldiers in ''The Ark of Napishtim''. Adol can rack up a high body count while rescuing enslaved Redhans from a Romun fleet that is enslaving them on the basis that they are "subhumans" instead of humans, and the bodies stay in the scene until Adol leaves it.
* EvilAllAlong: [[spoiler:Sister Nell and Bishop Nikolas]] in ''Ys: Oath in Felghana''.
* EvilCounterpart: Gruda to Adol in ''Dawn of Ys''. They are both fearsome swordsmen with mastery of magic.
* EvilRedhead: Kishgal in ''Origin''.
* EvilSorceror: Dark Fact in ''Ys I'', Dalles and Zava in ''Ys II'' and ''Ys Origins'', [[spoiler:Sister Nell]] Dularn in ''Ys: Oath in Felghana'', [[spoiler:Cain Fact/Darm]] in ''Ys Origins'', and Bami in all versions of ''Ys IV''.
* EvilTowerOfOminousness: The Darm Tower and the Ark of Napishtim.
* FakingAmnesia: [[spoiler: Feena does this in Ys I, and reveals the deception in the endgame of Ys II.]]
* FallenAngel: Eldeel in ''Dawn of Ys'' and ''Mask of the Sun''.
* FallenHero: Toal in ''Origin''. [[spoiler:[[FakeDefector It turns out he's not.]]]]
* FamousLastWords:
** Ys I and II (PC-Engine translation):
-->'''Dark Fact''': I know you are searching for the secrets contained within the Books. You have done well so far, I am impressed by your daring ambition. Of course, you are still defenseless against my superior powers. The name Dark Fact will be the scourge of all men to come! Oh you are brave, but you are also a fool! You have no chance without the protection of the silver equipment. Knave! PREPARE TO DIE!'''
-->'''Darm''': I am pure evil. My followers and I were born from the dark magic of the Black Pearl. I am the living epitomy of terror and destruction. You don't stand a chance against my forces of decimation. I shall crush, and consume you.
-->'''Feena''': Adol, promise you'll always remember the girl in me.
* FantasticRacism:
** In ''Ys II Chronicles'', most people are scared of Adol when he is transformed into a roo because roos are intelligent nonhuman beings. A few older people recognize roos as not demons and treat him nicely when he is a roo.
** This trope is inverted by demons. They (with one notable exception, Keith Fact) do not hesitate to kill all humans, but most demons except for Dalles mistake Adol in roo form for a demon, talk to him, and will not attack him.
** The [[TheEmpire Romun Empire]] considers sentient nonhumans like the Redhans to be [[SlaveRace slave races]].
* FantasyCounterpartCulture: The franchise takes place in a semi-medieval fantasy counterpart world. Most of the games take place in locations based on the continent of Eresia (Europe) and Afroca (Africa), while the Atlas Ocean (Atlantic Ocean) seperates Eresia from the continent of Atlas ({{Atlantis}}). Presumably, the equivalent of Asia exists to the east of Eresia, but has yet to be explored. Meanwhile, the "Vortex of Canaan" in ''Ys VI'' is a reference to TheBermudaTriangle, while the "Romun Empire" is an obvious stand-in for UsefulNotes/TheRomanEmpire. Furthermore, regions such as Garman, Greek and Creet are based on similar, geographical areas of Germany, Greece and Crete. Specific locales, however, are estimated as the following.
** ''Ys I'' - Esteria (An island off the southwestern coast of Brittany, France)
** ''Ys III'' - Felghana (Northern Germany, around Rostock)
** ''Ys IV'' - Celceta (Celtiberi Region in the Hispanic peninsula of Spain)
** ''Ys V'' - Xandria (Alexandria, Egypt)
** ''Ys VI'' - Canaan Islands (The Caribbean Islands)
** ''Ys Seven'' - Kingdom of Altago (Ancient Carthage in Northeastern Tunisia)
** ''Ys VIII'' - Isle of Seiren in the Gaete Sea (Saronic Islands in the Aegian Sea of Greece)
* FeedTheMole: One of the demons tells Ado-roo (Adol in roo form that is mistaken for a demon by many humans and demons and is able to speak and understand the demons' language) that a key item is in the subterranean canal in Ys II. However, she lies about what part of the subterranean canal that item is in.
* {{Feelies}}: Atlus released a soundtrack CD with the DS compilation of the first two games and Creator/XSEEDGames released soundtrack [=CDs=] and various other items (such as a cloth map of part of the series's world) with the premium editions of ''SEVEN'' and ''The Oath in Felghana'' and the initial release of ''I & II Chronicles''.
* FiveBadBand:
** ''II'':
*** The BigBad: Darm
*** TheDragon: Dalles
*** The EvilGenius: Dalles serves this role as well as TheDragon
*** TheBrute: Druegar
*** The DarkChick: Zava
** ''The Dawn of Ys'':
*** The BigBad: Arem
*** TheDragon: Eldeel
*** TheBrute: Gadis
*** The EvilGenius: Gruda
*** The DarkChick: Bami
** ''Ys V'':
*** The BigBad: Jabir
*** TheDragon: Karion
*** TheBrute: Dorman
*** The EvilGenius: Baruk
*** The DarkChick: Rije
*** SixthRanger: Abis
** ''Ys Origin'':
*** The BigBad: [[spoiler:Cain Fact/Darm]]
*** TheDragon: Dalles. Zava can also be seen as one to Dalles.
*** TheBrute: Kishgal
*** The DarkChick: Epona and Zava
*** The EvilGenius: Dalles serves this role in addition to the one above.
*** SixthRangerTraitor: [[spoiler:Toal Fact]]
** ''Ys: Memories of Celceta'':
*** The BigBad: [[spoiler:Gruda in addition to the role below.]]
*** TheDragon: [[spoiler:Eldeel.]]
*** TheDarkChick: Bami.
*** TheBrute: Gadis.
*** The EvilGenius: Gruda.
*** SixthRangerTraitor: [[spoiler: Remnos]].
* FiveManBand:
** Adol and his party in ''Ys: Memories of Celceta''
*** TheHero: Adol.
*** TheLancer: Duren.
*** TheBigGuy: Ozma.
*** [[TheSmartGuy TheSmartGirl]]: Frieda.
*** TheChick: Karna.
*** TagAlongKid: Calilica.
* FleshEatingZombie: ''Ys I'' has some dead soldiers that have been turned into zombies guarding the shrine. ''Ys II'' has a few zombies in the Ruins of Moondoria. They came about due to being possessed by demonic spirits. ''Ys: The Oath in Felghana'' has most of the residents including the soldiers of Valestein Castle turned into zombies due to a spell that Chester used in the castle to exact his revenge on Count [=McGuire=]. They all were caused by supernatural means.
* FloatingContinent: The eponymous Ys.
* ForcedLevelGrinding: In earlier games, this is pretty much required if you want to be able to hurt a boss even slightly. Fortunately, reaching the level caps in earlier games is easier than in later ones (in the more recent remakes of the first one, the level cap is just 10, though the [=TurboGrafx=]-CD version goes higher than this).
* ForegoneVictory: Hugo's second fight with Pictimos. Hugo gets a big power boost. If you somehow manage to lose, you get an achievement.
* FrameUp: [[spoiler:Adol is framed for assassinating TheGoodKing.]]
* FrickinLaserBeams: Zirduros, a boss in ''The Oath in Felghana'', can fire a laser cannon.
* FunnyAnimal: Roos.
* GenocideBackfire: [=McGuire=] ordered the genocide of Genos Island to kill the descendants of Genos. [[spoiler:Chester Stoddart, one of the two survivors, turns almost everyone in [=McGuire's=] castle into zombies as part of his revenge.]]
* GetOnTheBoat: Odd usage -- some of Adol's adventures start with him getting on a boat... but gameplay doesn't start until the boat ''sinks'', leaving him stranded at the site of his current adventure. Adol has rarely set foot on a boat that has not later sunk. This trope is actually played straight with no sinking in Ys Seven.
* GiantSpaceFleaFromNowhere: Lots of the bosses have no connection with the storyline, although they may guard a PlotCoupon (e.g. many of the bosses in ''Wanderers/Oath'') or fit with the dungeon theme, such as the Ice Golem in ''Mask of the Sun''. One of the most out-of-place bosses is [[ThatOneBoss that one centaur boss]] you fight on Minea Plains in ''Mask''. Also, in ''Ys SEVEN'', [[spoiler:Rul-Ende, the root of all existence in Altago which appears right after the battle with Tialuna with no explanation beforehand. ]] In ''Ys VIII: Lacrimosa of Dana'', [[spoiler:in true ending route, [[TrueFinalBoss Life of Origin]] appears at the end of the final dungeon with no explanation other than defeating it being the requirement to see Dana]].
* GirlOfTheWeek: ''Ys'' heroines are known as "the {{Bond Girl}}s of video gaming" for a reason -- Adol seems to end up with at ''least'' one love interest per game. Lilia is the most "solid" love interest Adol's ever had but even she's been AWOL for three games now. Elena is (''very'' arguably) the most popular one with the fans. And, as per its wont, [[spoiler:''Ys SEVEN'' '''really''' fucks with the player's expectations (and head) concerning this, especially at the end]].
* GoldenEnding: XSEED Games refers to Toal's ending in Origin as the true ending. It's easy to see why, because at the end Toal witnesses [[spoiler:his father Cain fusing with the Black Pearl and becoming the Demonic Darm, whose body is destroyed and reduced to the the Black Pearl, with Cain still in it. The Goddesses seal the pearl and Darm away.]] In addition, at the very end it says "To be continued in ''Ys: Ancient Ys Vanished: Omen," the first game. Finally, [[spoiler:Toal leaves behind the Silver Sword by the Roda Tree which you see sticking out of the ground in the very end of his ending...the same one Adol finds in Ys Book 1, thus explaining the origin of the sword. Toal Fact is basically one of the more important characters in the Ys universe overall, what with his ties to the books-pretty important themselves one can say-and the fact without his sword Adol would have gotten nowhere.]]
* {{Gotterdammerung}}: Adol's gotten involved in this ''several times'' now.
* GuideDangIt: Many examples:
** To give one, the Gold Tabulas in ''The Ark of Napishtim'' (and, by extension, the Winged God Emblem) is definitely one of these. Various third-party titles like Taito's port of IV also have loads of these.
** The Korean ''Ys II Special'' is an entire game of Guide Dang It moments.
** Getting the Black Tabulas is worse; you have to use a certain item that allows you to see invisible platforms, with no hint that it does so, and you don't obtain it until after completing the dungeon that contains said tabulas.
** Both puzzles involving the Evil Bell, to some degree.
** The puzzle to regain your form after your InvoluntaryTransformation by Dalles is more of a MoonLogicPuzzle in the [=TurboGrafx-CD=] version, but you get almost no hints about it in ''Eternal''.
** Goban tells you that the Mask of Eyes allows you to see hidden passages. In the [=TurboGrafx-CD=] version, there are the hints of [[spoiler:"I saw that blue statue's eyes glow" and the outline of a doorway]], but in other versions, there's nothing remotely hinting at the hidden doorway in the shrine basement. The Steam, PSP, iOS, and Android versions will draw [[GlamourFailure slight defects in the lighting of the illusionary walls]] in the mountain shrine, but those defects are so subtle that they could be easily overlooked and could probably be completely lost if the display in use is of poor quality like a monitor that uses a 6-bit panel. The illusory wall in Darm Tower is has no visual defects, but Dogi will give Adol a clue to look for Raba in the hallway next to where he is hiding when he breaks Adol out of the dungeon cell.
** The smartphone versions of ''Ys I'' shows you a couple of pictures that vaguely suggest that you must run into enemies' sides or back to land clean hits. There is nothing to let you know that you can also get clean hits by running into the sides of their fronts. The smartphone version of ''Ys II'' is even worse by not providing any tutorial whatsoever on how to physically attack enemies, so someone who did not buy ''Ys I'' would be clueless on how to attack enemies.
** There are two puzzles in ''Ys I'' that are not solvable unless you TalkToEveryone, consult a walkthrough, or remember the solution from another game with the same puzzle.
*** One puzzle is how to get the silver sword. You need to find a roda seed and the silver harmonica in Rastin Mine. You would not know that you should eat the roda seed unless you talk to someone who states that it is a rare delicacy that everyone should try if they find one. Eating one grants you the ability to communicate with the roda trees. You also have to return the silver harmonica to Reah. She then plays a song that wakes the roda trees up. Otherwise, the trees will just mumble nonsense in their sleep if you approach them after eating the roda seed. Finally, you have to talk to the roda trees to get the silver sword.
*** Another puzzle is how to pass the Devil's Corridor. You would not know how to solve this puzzle unless you talked to Raba twice when he is trapped in the cell adjacent to the Devil's Corridor, remember the solution from Hugo Fact's route in ''Ys: Origin'', or consulted a walkthrough.
** The fetch quests where Adol has to find lost pikkards have no clues on where they are located.
** Many achievements in the UsefulNotes/{{Steam}} version:
*** '''Hey Baby, What's Your Width?''', '''I Can't See You, But I Can Feel You''', and '''Police Are On Their Way''': During both games' EscortMission, there is a single narrow passage which you must push your escorted character into. This will trigger some dialogue and give you the achievement (I Can't See You also requires you to be wearing the Mask Of Eyes while doing so).
*** '''No Reservations''': In ''Ys II'', there are four [=NPC=]s who will give you food if you give them enough gifts. Some are somewhat hinted at because they raise meat animals, but one of them [[spoiler:is a [[TheBlacksmith blacksmith]]]] and is never hinted to give you anything.
*** '''Bill the Duck''': You must give gifts to an NPC (once again, there are absolutely no hints as to which NPC this is) until he tells you that sometimes the ducks eat gold coins. [[EventFlags Now you can examine the ducks outside]] and one of them will give you gold and the achievement.
*** '''Where's Aldow''': You must use the Alter spell and return to the first dungeon, in the area where you found the Evil Bell. One monster will give you the achievement if you talk to him.
* GuineaPigFamily: [[spoiler: Cain Fact used his sons as test subjects to see how they handled being turned into demons in order to see if he himself can handle demonic energy before fusing himself with the Black Pearl and becoming Darm.]]
* HairColors: Every color has representation somewhere in the franchise. Several characters even rotate through the rainbow in different installments: Lilia's hair is red in most older games, dark brown in the OVA, and light brown in newer games. Karna goes all the way from dirty blonde to black depending on which version of the story you're looking at.
* HarmfulToMinors: [[spoiler:Chester witnessed his village become a victim to genocide when he was a boy and became a victim of this trope. This is his motive for his actions. [=McGuire=] is the one who ordered this genocide. Nikolas Garland is the one who manipulated [=McGuire=] into ordering the genocide.]]
* HauntedCastle: [[spoiler:Chester turns Valestein Castle into this by starting a ZombieApocalypse inside there.]]
* HealingCheckpoint
* HeroicMime: Adol.
** Averted in ''Wanderers'' and ''Mask of the Sun''.
** Subverted in ''The Ark of Napishtim'', ''Complete/Chronicles'', ''Oath'', and ''SEVEN'', where his words are described from a third-person point of view (i.e. "Adol tells so-and-so about so-and-so")
** Also subverted once in ''II'', in which he tries to tell the refugees that he WasOnceAMan, as well as the opening cinematic when he speaks to Lilia (though she's voiced; his responses are subtitled text).
** And once in ''I'', when he meets Feena for the first time.
* HeroicBSOD: Yunica enters one after [[spoiler:failing to prevent Feena from getting captured]].
* HeroicSacrifice: [[spoiler:Chester in ''Wanderers'' and ''Oath''.]]
** In Yunica's arc in ''Origin'', [[spoiler:Roy]] does one to save the former from a trap set up by Zava.
** A sizable part of Toal's arc in ''Origin'' is [[spoiler: Toal and Reah]] each trying to make one on behalf of the other. [[spoiler:Reah succeeds]].
* HeterosexualLifePartners: Adol and Dogi, of course.
* HisNameReallyIsBarkeep: No, Dark Fact isn't just an intimidating title. His first name is literally Dark.
* HomingProjectile: Zirduros, a boss in ''The Oath in Felghana'', can fire two homing missiles at a time.
* HopelessBossFight: The first and third phases of the FinalBoss in ''Mask of the Sun''. [[spoiler: After dodging Eldeel's lightning attacks for a minute, Adol will solve the MoonLogicPuzzle and figure that you have to use the MacGuffin necklace on him. During the third phase, after dodging him again for a while, the Disciples will destroy his armor with a group attack.]]
** A more literal example: the battle with the possessed Keith Fact atop Darm Tower in ''The Dawn of Ys''. FailureIsTheOnlyOption here.
** The first fight with [[spoiler:Garland]] in ''Oath''. It is literally impossible to break his defensive barrier without the game's SwordOfPlotAdvancement, which you don't get until after the fight.
** The mid-level boss fights of Guilty Fire level of ''Origin'' for Yunica and Hugo's route's are intended to be unbeatable. You ''can'' beat them if you level up enough, but all you get out of it is an achievement slightly different scene after the battle (which has the same net effect on the plot).
* HundredPercentHeroismRating: In ''Ys II Eternal''/''Complete'', Adol could give gifts to every villager he meets. While this has little impact on the gameplay, there are some perks as few villagers can give good healing items or interesting information when Adol maxes out their likeness. In ''Ys: Memories of Celceta'', Adol can give gifts to animals and perform quests for villagers. You get achievements for making all animals like Adol and finishing all quests for villagers.
* ImpaledWithExtremePrejudice: [[spoiler:Happens to Dalles at the end of Toal's story in ''Ys Origin'' by Cain Fact.]]
** Done to [[spoiler:Eldeel by Gruda]] in ''Dawn of Ys''.
* ImpossibleItemDrop[=/=]MoneySpider: Played straight in all games but ''V'. Dead enemies drop money and occasionally things like Emel and Raval. Enemies in ''Oath'' and ''Origin'' also drop instant-use healing items and temporary stat boosts and enemies in ''SEVEN'' drop synthesis items. In ''V'', the enemies don't drop money, instead they drop gems that you exchange for cash. (Don't ask why the literal spiders are carrying around topaz.)
* InferioritySuperiorityComplex: Hugo's main issue with Toal in ''Ys Origin''. [[spoiler:In Toal's route, it turns out that Toal was aware of Hugo's talent in magic and turned down the position of the heir of the Fact family so Hugo, who is more talented, can become the heir.]]
* InfinityPlusOneSword: The Flame Sword in ''Ys I'' and Leo's Sword in ''The Dawn of Ys''. Both are the strongest weapons in the game, both are entirely optional (Leo's Sword requiring a bit of lateral thinking to acquire), and attempting to use either against the final boss will result in you seeing the Game Over screen. As a bonus, these games also include Infinity Plus One Armor and Shields which are equally worthless against the Big Bad.
** The Violent Light Sword and armor in ''Mask of the Sun'', again useless against the BigBad Eldeel.
** InfinityMinusOneSword: The Silver Sword/Armor/Shield in ''Ys I''. You can get all of them by around the halfway point of the game, and even ''scratching'' Dark Fact requires you to equip the full set.
* InformedEquipment: Played entirely straight in ''I''-''V'' where your appearance does not change based on equipment. Partially averted in ''VI'' where your weapon changes (and completely averted in the [=PS2=] port where everything changes). ''Oath'' has your appearance change whenever you have a full set of matching equipment and only a full set. Appearance in ''SEVEN'' only changes based on weapon and shield. In ''Origin, Yunica's model subverts it by changing slightly when she changes between using her axe and her sword, while Toal's model plays it straight and does not change when [[spoiler:he regains his sword before the final battle]]).
* InstantRunes: Falcom really, ''really'' loves their insanely high detailed magic circles, runes, pentagrams etc. whenever someone casts a spell. Just take a look at ''Origins'', the last level is basically SceneryPorn ''made of magic circles''.
* IntercontinuityCrossover: ''Alternative Saga'' crosses over ''Ys'' with ''VideoGame/TheLegendOfHeroesTrailsInTheSky'' using ''SEVEN'''s engine and includes support characters from Gurumin, Zwei, Brandish, ''The Legend of Heroes III'', and ''Zero no Kiseki''.
* InternalReformist: While the [[TheEmpire Romun Empire's]] government is generally thoroughly rotten, there are a few women who do not fit this evil mold and work to reform it.
** Griselda in ''Memories of Celceta'' is one of these because she does not tolerate the typical evil that is normal within the Romun Empire's government and instead cares for the citizens.
** Elizabetha, the wife of [=McGuire=] in ''The Oath in Felghana'', vows to get her husband to atone for his crimes once Adol tells her about [=McGuire's=] evils. She also cares about the citizens once she meets them.
* ItemCrafting: You can boost the power of your swords in ''VI'' and all your equipment in ''Oath'' by gathering enough [[{{Unobtanium}} Emel or Raval]]. ''SEVEN'' also allows you to create certain equipment and items by gathering the right synthesis materials. ''Origin'' has weapons getting enhanced with Cleria and armor getting blessed with Spiritual Power.
* InvincibleMinorMinion: Black enemies in ''VI'' on Nightmare, which are usually GoddamnedBats (one of the {{Mini Boss}}es is guarded by these), and the GoddamnedBats in the cave, until you get the Bell.
* ItsAllUpstairsFromHere: Darm Tower in ''I'', ''Dawn''. and ''Origin''.
* IveComeTooFar: [[spoiler:Chester's motivation for not turning back, just before he stabs Dogi.]]
* IWantToBeARealMan: Dogi's motivation for leaving Felghana and setting out for adventure.
* KatanasAreJustBetter: Notably averted. Adol's swords based on real-world weapons have taken inspiration from Europe, Africa, India, and Persia, but never Japan. Over 20 years after the series's debut, Scias in ''SEVEN'' is the first character in the series to have something recognizable as a katana.
** The [=TurboGrafx-16=] version of ''Ys I'' called the Talwarl the Katana.
* KilledOffForReal: Sara in most versions of the story, including the one Falcom considers canonical.
* KillerRabbit: The [[RidiculouslyCuteCritter Black Pikkard]] in ''Oath in Felghana'', which can only be fought after beating the game on Inferno.
* KillerRobot: The Ark of Napishtim is full of enemy robots.
* KnightErrant: Adol, who is WalkingTheEarth looking for people in need of saving. He's good at both.
* KnightInShiningArmor: Adol.
* LargeHam: [[spoiler:Nikolas Garland]] in ''Oath''. Commander Leo in ''Memories'' is also quite hammy.
* LaserGuidedAmnesia: Adol suffers this in ''Ys: Memories of Celceta''. [[spoiler:More specifically, this is what happens to the outsiders who come into the village of Highland for knowledge and get out. Namely, they forget about the existence of Eldeel and the village of Highland but retain the knowledge they received from Eldeel. This is done to ensure that people do not come back for more knowledge and end up changing the future recorded in the {{Akashic Records}} too much. However, Adol suffered his amnesia from falling down a waterfall and forgot much more like his name and that he is a swordsman He did not have any amnesia inflicted on him in Highland because he refused to accept knowledge from Eldeel.]]
* LeaningOnTheFourthWall: If you talk to him after killing the first boss & saving Feena in the first game, Slaff will wonder if they're all in some fantasy land built for someone's amusement.
* LeapOfFaith: Ys VI: The Ark of Napishtim has several of these in the Ruins of Lost Time. A failure to make one of these jumps will send Adol into a room full of monsters instead of killing him.
* LeeroyJenkins: Adol qualifies. He will charge blindly head-on no matter how dangerous the place is.
* {{Leitmotif}}: "Theme of Adol" (used in pretty much every game except ''VI'' and ''Origin'', sometimes in MusicalPastiche form), "Feena", "Lilia", "Termination" (Darm), "Karna", "The Clan of Darkness", "Leeza", Eldeel's theme ("Eldeel" and "A Kiss from Eldeel"), "Niena", "Theme of Lovers" (Stoker's theme in ''V''), "Theme of Kefin", "Turning Death Spiral" (the QuirkyMinibossSquad BossBattle theme in ''V''), Olha's theme, "The Successor of Almarion" (Ernst's theme), Napishtim's theme (heard in "Revival of The Great Ark", "Defend and Escape", "The Depth Napishtim", "Collapse of the Ark", and "Zeme's Protection"), etc.
* LethalLavaLand: The Moat of Burnedbless in ''II'', the Fire Mountain in ''Mask'' or Nergal in ''Dawn'', the Zone of Lava below Illburns Ruins in ''III'' and ''Oath'', parts of the Ruins of Amnesia in ''VI''... played only for visual effect until ''Oath'' and ''VI'', respectively, made the last two straight examples.
* LimitBreak: An EXTRA attack. In VideoGame/YsSeven, this meter was introduced and was explained as a product of the dragon energy that weapons from Altago possess. This meter is recycled in VideoGame/YsMemoriesOfCelceta, but that introduces a PlotHole due to not explaining how any of the party learned how to perform these moves, and because Adol does not use any similar moves in later games except for VideoGame/YsSeven and ''Lacrimosa of Dana''.
* LiteraryAgentHypothesis: According to ''Ys Eternal''[='=]s loading screen and the opening movie of ''Ys II Eternal'', the games are actually 'novels' translated from Adol's own journals. This serves as a nice handwave for things like the blatant differences between ''Mask of the Sun'' and ''Dawn of Ys''. This conceit was carried forward into ''Oath'', though oddly enough not into ''Ys SEVEN''. ''Memories of Celceta'' picks it up again in the game's intro and in the companion "journal" that comes in the limited edition.
* LittleBitBeastly: The Rehda in ''Ark of Napishitim''.
* LoadsAndLoadsOfLoading: The PSP port of ''VI'' is an exercise in patience due to its load times -- 5-10 seconds for every ''screen'' (this gets especially annoying when trying to do jumping puzzles).
* LongSongShortScene: ''Ys III'' can get really weird/bad about this:
** The song "The Boy Who Had Wings" only played at the entrances of dungeons (these take 30 seconds to cross, typically, with the song being about two minutes long), "Prelude to Adventure" played on the world map (which can often be dealt with in ''under ten seconds'', despite the song being about a minute per loop!), and "Theme of Chester" only plays in the last corridor of the Ilburns Ruins, and only in certain versions. On that note, the biggest standout is perhaps "Chop!!", which plays in a brief confrontation with Chester... exclusively in the ''[[UsefulNotes/SharpX68000 X68000]] version'' of the game, meaning most versions lack the song entirely!
** The status of most of these is inverted (almost certainly purposefully) in the ''Oath in Felghana'', which gives "The Boy Who Had Wings" much more respect by making it the main overworld theme, while "Prelude to Adventure" can only be heard by stepping outside of town before it's time to set out for the first dungeon (which is after Adol introduces himself to the villagers), after which "The Boy Who Had Wings" plays there instead, and "Theme of Chester" is actually used as Chester's {{leitmotif}}, even getting a second version for later in the game. "Chop!!", meanwhile, was heavily remixed and became the theme of the infamously difficult second boss fight with Chester.
** ''Origin'' has a jazzy remix of the song "Tension", whose original version played on the upper floors of Darm Tower in the first game. As opposed to how its original appearance saw it used instead of "Tower of the Shadow of Death" further up the tower (thus giving it plenty of usage), ''Origin'' has its version used for a single boss fight.
* LoveInterestTraitor: Tia from seven though unlike most examples she did have feelings for Adol.
* LudicrousGibs: Ever since ''Ys Eternal'', mook monsters have had tendency to explode into these; bosses can vary. They are ''particularly'' spectacular in ''Ys I & II Chronicles''. Mercifully, this does ''not'' apply to our heroes being on the receiving end of a beatdown.
* MacrossMissileMassacre: Zirduros, a boss in ''The Oath in Felghana'', can fire lots of missiles at once.
* MagicKnight: Adol, Chester, and Gruda.
* TheMagicGoesAway: Happens at the end of many installments due to Adol's defeating SealedEvilInACan.
** Ys II: The destruction of the Black Pearl leads to the magic disappearing from Ys with the floating continent's coming back down.
** Ys IV: Eldeel's sealing himeslf (the last of the Eldeen civilization) and the destruction of the Mask of the Sun result in the complete end of the Eldeen civilization and the Akashic Records being lost to the world.
** Ys V: The defeat of Jabir and the destruction of the philosopher's stone cause the end of the mythical kingdom of Kefin and its alchemy.
** Ys Seven: Dragon energy goes away after Adol destroys Rul-Ende to keep Altago from being destroyed. Unfortunately, the dragons' existence is tied to Rul-Ende's existence, so dragon energy no longer exists because it uses the dragons as their source.
* MacGuffin: Emelas.
* MacGuffinDeliveryService: Happens in ''Oath'' and ''Kefin''. See the UnwittingPawn entry below.
* MadeOfIron: Adol. When you survive getting shipwrecked and thrown off the cliff several times, you deserve the title.
* {{Magitek}}: It's ''heavily'' implied that the Eldeen civilization was based on this. It's never outright stated, but dungeons strongly associated with them tend to look suspiciously high-tech, sometimes going so far as to include [[KillerRobot robotic enemies]]. [[spoiler: The final boss of ''Ark of Napishtim'' is basically a magical weather-control supercomputer.]]
* TheManBehindTheMan: [[spoiler:Darm]] behind [[spoiler:Dark Fact]].
** Also [[spoiler:Cain Fact]] behind [[spoiler:Dalles]] in ''Origin''. Which makes [[spoiler:Cain/Darm the man behind ''two'' men, with Dark being his distant descendant.]]
** [[spoiler:Garland]] behind [[spoiler:Chester and [=McGuire=]]] in ''Oath''.
** [[spoiler:Jabir]] behind [[spoiler:the entire kingdom of Kefin]] in ''Ys V''.
* ManipulativeBastard: [[spoiler: Garland]] in ''Oath''. Gruda in both versions of ''Ys IV'' (''The Dawn of Ys'' and ''Mask of the Sun''), who is mainly responsible for Eldeel's fall to evil.
* MarathonBoss: The final bosses of ''I'' (excluding the [=TurboGrafx-CD=] version), ''II'', ''The Dawn of Ys'', ''Oath'', and ''V''.
* MarathonLevel: Darm Tower in ''I'' is so massive it comprises almost half the game.
* MasterSwordsman: Chester in ''Ys: The Oath in Felghana''. Adol himself counts as well.
* TheMaze: The warp mirror mazes in Darm Tower, and in Iris Tower in ''Mask of the Sun''.
* MechaMooks: Ys VI is full of robotic mooks.
* MechanicalMonster: The Oath in Felghana and The Ark of Napishtim have robotic bosses.
* MercyKill: In Taito's port of ''Ys IV'', people [[BalefulPolymorph transformed into monsters]] by Bami can't be saved; they can only be killed, briefly returning them to human form before they die. Karna [[WhatTheHellHero was angry with Adol]] for killing Remnos until she saw another victim thank Adol for freeing him and allowing him to [[DyingAsYourself die as a man]], after which she apologized.
* MissingSecret: Generally averted as there's one item or piece of equipment to fill every inventory spot, so if you've missed something, you'll know. Played straight in ''Mask of the Sun'', in which there are more inventory slots than items. ''The Dawn of Ys'' looks like it has this, but there are some rare items and post-game bonuses that fill the gaps.
** Toyed with as a bug in the Korean ''Ys II Special''. After beating the first boss, you will lose any sword in your inventory. There's a second sword you can gain before the boss; not picking it up right away gets you a better weapon later but the inventory system is balanced on the assumption that you grabbed it earlier and lost it forever along with the first sword.
** Also, in Interchannel's DS port of ''Ys I'' (released worldwide as part of ''Legacy of Ys''), where they added a new sword, shield, and armor but forgot to add a new ring, leaving your inventory permanently unbalanced and leading new players to wonder where the non-existent sixth ring was.
* MoneyForNothing: ''Ys I'' has this in two forms. First, most items that you can buy can also be found for free. The only things the game requires you to purchase are one armor and one shield of any kind so Sara will talk to you and give you the Coupon of Plot Advancement. Also, once you enter [[PointOfNoReturn Darm Tower]], you will still receive money for killing enemies even though there is absolutely nothing you can do with it.
* MoneySpider: Golden Pickard in ''Ys: Memories of Celceta''.
* MookFaceTurn: Berhardt deserted [=McGuire's=] army in ''Oath'' because he could not carry out his order to slaughter everyone on Genos Island because his next victims would have been children. He rescued them instead.
* MookMaker: Several of the bosses, including Zomplus, Orjugan, and Napishtim (second form) in ''VI'' and Druegar in ''Ys II Eternal'', do this.
* MultipleEndings: ''VIII'' is the first entry in the franchise where Adol's choices directly influence and change the plot and ending.
* MysteriousWaif: Feena, Reah, and Niena.
* MythArc: ''I'', ''II'', and ''IV'' originally. ''VI'' continued the arc and it plus ''Oath'' serve to tie ''III'' in as well, leaving ''V'' and ''SEVEN'' the only unconnected ones (save for the fact that ''V'' introduced recurring character Terra).
* NameOfCain: [[spoiler:Needless to say, he is evil.]]
* NamesToRunAwayFromReallyFast: Dark Fact. You know a guy's bad news when his ''first name'' is Dark.
* NewGamePlus: ''The Dawn of Ys'' gives you the option of starting a new game Silver and Gold Rings'' after beating the game. These let you earn double EXP and Gold respectively. The PSP port of ''Oath lets you choose from a series of bonus options including starting your next game with free gold and Raval, being able to upgrade equipment to higher levels, or beginning with certain abilities already learned.
* NiceJobBreakingItHerod: [=McGuire=] ordered the genocide of Genos Island to kill the descendants of Genos. If it had succeeded, an ironic case of NiceJobFixingItVillain would have resulted because unsealing the local Galbalan requires draining energy from one of the descendants of Genos.
* NippleAndDimed: Whenever the goddesses are drawn without clothes, their nipples are not drawn.
* NonActionGuy: While his sister, Karna, is a hunter, Remnos is far more skilled with music than hunting. [[spoiler:Or so he claims.]]
* ObviouslyEvil: Most villains. [[spoiler:''SEVEN'' proceeds to have a ''lot'' of fun with this.]]
* OddballInTheSeries[=/=]LaterInstallmentWeirdness: Among the games, a few have been or are considered major stumbling blocks for the franchise:
** The first is the original ''Ys III: Wanderers From Ys''. This one generated a fairly significant BrokenBase; the music was awesome and people liked the story and art, but the sudden shift to ''[[VideoGame/ZeldaIITheAdventureOfLink Zelda II]]''-ish side scrolling was deeply unpopular. ''Oath in Felghana'' more or less fixed all the problems people had with the game, though, and ''Oath'' is considered a contender for "best Ys game ever". The merits of the original ''Wanderers'' remains a point of contention, though.
*** Interestingly, ''Ys III'' was also chosen to essentially "headline" the series' original Western push in the early 90s, once Falcom was interested in that market and since it was at that point the newest game. The game ended up being just as divisive in the West as in Japan, and so the original Ys push fizzled, leading to us missing ''Ys IV'' and ''V''. On that note...
** The ''much'' more obvious oddball is ''Ys V: Kefin, The Lost City of Sand''. On the surface it sounded great, elaborating on a relatively unexplored portion of the world and backstory. But it was ''only'' released for the Super Famicom in its first release (taking the series completely away from its PC roots and even from its [=TurboGrafx-16=] following), was hugely limited graphically as a result of being cartridge-based (with many complaining that "it looks like every other Super Famicom RPG ever, but blander", which is ''particularly'' impressive given the intended exoticism of the game's particular setting), and worst by far, the music was all synth and pseudo-orchestral rather than the CD-quality rock tracks the series had become famous for!
*** Although ''Ys V'' did establish some things that would later become standard procedure in later games (jumping, fast-paced button-mashing as opposed to just running into dudes, etc), ultimately the single (non-PC) platform and comparatively awful music caused a full-blown fan ''revolt'' in Japan as former fans absolutely ''despised'' the game. ''Ys III'' may have taken some heat but ''Kefin'' just about killed the franchise ''stone dead''. Falcom had to spend the next ''seven years'' developing other games and remakes of the first two games just to repair their reputation before daring to try and release another new Ys game. To this day, ''Kefin'' ranks pretty squarely at the bottom of polls when the games are ranked; only the pretty cool story prevents it from being completely rejected by fans.
* OminousLatinChanting: Used during the [[http://www.youtube.com/watch?v=ESLX5Qidp1o "Revival of the Ark" cutscene]] in ''Ys VI''. Also present in the TrueFinalBoss's battle theme from ''Origin''.
* OmnicidalManiac: Galbalan in ''Oath'' and Arem in ''Dawn''. They both declare that they will destroy everything before engaging Adol in the FinalBoss battle.
** The [[spoiler:Ark of Napishtim]] could also qualify, due to its plan to [[spoiler:flood all the continents and wipe out all of humanity]].
* OneHitKill: Velagunder in the [[UsefulNotes/TurboGrafx16 TurboGrafx-CD]] version of Ys II can do this to Adol. This is the first boss, and one shot from this boss is enough to kill Adol. Fortunately, its shots are not too fast to be dodged. Killing this boss requires you to shoot this boss with fire magic when it is open to being attacked while dodging all shots from this boss.
* OneManArmy: Adol. [[spoiler:Toal]] in ''Ys Origin'' counts as well considering [[spoiler:he, along with Saul Tovah, fought against the entire army of demons in order to earn time for the palace of Ys to float.]]
* OneWingedAngel: Garland in ''Oath'', Gadis and Arem in ''Dawn'', Gruda in ''Mask'' and ''Memories'', Dorman and Jabir in ''Ys V'', Ernst in ''Ys VI'', Dalles [[spoiler:and Cain Fact]] in ''Ys Origin''
* OurAngelsAreDifferent: The Eldeen.
* OurDragonsAreDifferent: [[spoiler:Dragons in this world are artificial creations by humans who tried to make Emelas but failed.]] However, this is recently subverted in ''Ys SEVEN'', in which the five dragons of Altago, who are worshiped as gods there, have no connection to the Emelas or the Eldeen civilization.
* PaedoHunt: The achievement "Police Are On Their Way" from the UsefulNotes/{{Steam}} version of ''Ys II'' implies this. The icon shows Tarf, some hearts, and a [[CensorBox black box]] with the words "[[NoJustNoReaction NO. I REFUSE TO DRAW THIS]]" written on it.
* PatrioticFervor: Baslam despises the Romun Empire so much because it is trying to conquer his homeland that he will team up with the Redhans which he hates when the Romun Empire invades, occupies his town, and enslaves the Redhans.
* PermanentlyMissableContent:
** The Starlight Medal in ''VI'' will be lost if you don't grab it on your one chance to infiltrate the Romun fleet.
** You have a limited timeframe to accept the sidequest leading to the Augite Brooch in ''Oath''.
* PetTheDog: In ''Ys: Oath in Felghana'', Count [=McGuire=] may appear as a typical [[AristocratsAreEvil evil aristocrat]] in most scenes, but he genuinely cares about his family.
* PhlebotinumRebel: Adol Christin and Hugo Fact can use magic that use the same source of power as what spawns demons, the Black Pearl. Since Darm and the Black Pearl became one entity in Ys: Origin, Adol is using Darm's power against him in their fight.
* PhysicalGod: The Eldeen race. They are even worshiped as gods by humans and the Rheda. However, subverted with Felghana's religion, which worships {{God}} and seems to be the Ys world's equivalent of the Roman Catholic Church, and anyone familiar with any of the real-world religions that worship him know that he isn't a PhysicalGod.
* PirateGirl: Terra.
* PointOfNoReturn: The Darm Tower in ''I'' (with another one after defeating Dark Fact in the [=TurboGrafx-16=] version that ends up with Adol in Ys and no way to get back to Darm Tower, as that game merges ''I'' and ''II'' into one game), Kefin and TheVeryDefinitelyFinalDungeon in ''V'' (at least you can't save after the second one), and the Ark in ''The Ark of Napishtim''. At least the first and last examples warn you beforehand (and, in ''I'', it's impossible to be underleveled). Averted in ''Mask of the Sun'' where you can still use the Wing to warp out of the Golden Temple.
** In some cases, a certain location will be rendered inaccessable after the completion of a quest objective, causing any [[PermanentlyMissableContent missed objects there to be lost forever]]. For example, the Flame Cave in ''Mask Of The Sun'' (destroyed by the raising of the ancient city) and the town of Felt in ''V'' (buried by a sandstorm after the return of Kefin).
* PoliceBrutality: Adol becomes victim to this in Ys IV: The Dawn of Ys at the hands of the [[TheEmpire Romun Empire]] because he spotted some of its soldiers arresting Karna despite the fact that he did not intervene in the arrest (probably not knowing whether she was being fairly arrested or not), and the soldiers decided to arrest him just for spotting Karna's arrest. He quickly becomes a {{Determinator}} who wants to wipe out this empire's invasions of Celceta and Esteria.
* PoweredByAForsakenChild: [[spoiler:In ''Ys V'', the philosopher's stone that powers the kingdom of Kefin requires human sacrifices]].
** Also in [[spoiler:''Ark'', the special power in Isha's bloodline is required to awaken the titular Ark from its slumber beneath the ocean. And also to give Ernst his dark angelic wings, when he steals some of her power for himself.]]
* PowerGlows In ''Dawn'', your Cleria equipment gets enhanced into the Eldoran equipment, causing it to glow gold.
** In ''Ys Eternal'', chests containing Silver items had a distinct blue glow around them.
* PrivateMilitaryContractors:
** Geis is a mercenary.
** Adol also tries his hand at being a mercenary in Ys V. Dorman, his boss in this game, hires him to stop an environmental disaster, [[spoiler:but he is betrayed by Dorman and is forced to kill him when he decides to kill Adol. Dorman is actually one of the people causing the environmental disaster.]]
** Also, the party can accept quests which are mercenary jobs in ''VideoGame/YsSeven'' and ''Memories of Celceta''.
** Berhardt is a retired mercenary in ''The Oath in Felghana''.
* UsefulNotes/PowersOfTwoMinusOne: Adols HP and MP gauges max out at 255 in the original versions of Ys I and II. [[spoiler:In ''Ys II Chronicles'' for Steam, PSP, iOS, and Android, the gauges max out at 256, but you have to grind until you are at level 55, the maximum level in those versions.]]
* ProngsOfPoseidon: Some members of the Clan of Darkness can use tridents as weapons.
* PurpleEyes: ''Extremely'' prominent on the new designs for the Stoddart siblings introduced in ''Oath''.
* QuirkyMinibossSquad: Kishgal and Epona in ''Origin''; Gadis, Bami, Gruda, and Eldeel in ''IV''; Karion, Abis, and Baruk in ''V''.
* RainOfArrows: Aisha and Sigroon have a skill that does this.
* Really700YearsOld: [[spoiler:Feena and Reah]] are literally over 700 years old, given that [[spoiler:they are the Goddesses of Ys, which fell 700 years before the start of the first game]].
* RealTimeWeaponChange: In ''VI'', you can rotate through your Emelas swords during combat. ''Oath'' and ''Origin'' allow you to do the same thing with your magic-granting items.
* RebelliousPrincess: [[spoiler:Aisha.]]
* RecurringRiff: Recurring (non-{{leitmotif}}) themes include the treasure box and game over jingles, "Termination" (reused in the recap of the Darm battle during the intro of ''The Dawn of Ys''), "Beat of the Terror" (remixed as Overwater Drive in ''VI''), "Tower of the Shadow of Death" (returns in ''Dawn'' and ''Origin''), "Battle Ground" (redone in Over Drive, Sanctuary, and Armored Bane), "The Dawn of Ys" (remixed as "Temple of the Sun" later in the game), and "Memories of Celceta" (sort of the main theme of ''Ys IV'').
** "Ernst", in addition to using the beat of "Final Battle", is also [[SuspiciouslySimilarSong suspiciously similar]] to the tune of "Moon over the Castle", the theme of the Japanese versions of the ''Gran Turismo'' series.
** The BossBattle themes "Holders of Power", "Protectors", and "Death Blitz" from the first three games use a common riff during their "refrain" sections.
** "Lava Field", "Battle #58", and "The Heat in the Blaze" (main guitar riff).
* RedemptionRejection: In ''Oath'', [[spoiler:Dogi's speech to Chester about how empty and self-destructive his quest for revenge against [=McGuire=] is actually causes Chester to falter for a moment, but he ultimately decides to continue his plan because he feels he's [[IveComeTooFar too far into it]] to back out now.]]
* RedEyesTakeWarning: In ''Oath'', [[spoiler:Garland's eyes become noticeably redder after he reveals his TrueColors]]. Sister Nell also has red eyes, though nothing seems to be particularly insidious about her [[spoiler:until you learn that she's actually Dularn]]. In ''Origin'', [[spoiler:Toal and Hugo]]'s eyes become red when they activate their [[SuperpoweredEvilSide demon seeds]].
* RedHerring: In ''I'', [[spoiler:the Battle gear. Sure it's better than the Silver gear, but why does the trap insist on stealing the latter from you? Because it's the only effective equipment against the final boss, that's why.]] Sadly removed in ''II'', [[spoiler:where the Silver gear is the strongest one]].
* RegeneratingMana: Some of the games have the MagicMeter refill in various ways. In some games, it refills automatically. In others, it refills when attacking enemies normally.
* RegionalBonus: When the Windows version of ''The Oath in Felghana'' was released internationally, it gained an achievement system and has the Inferno difficulty unlockable without a patch. Since it's distributed through Steam, updates would also be easier and the game is downloaded after it's paid for instead of needing a disc.
* {{Retcon}}: ''Oath'' made a few of these to tie the plot of ''III'' further into the rest of the series. ''Ys Origin'' made a few more.
* RetiredBadass: Berhardt in ''Oath''.
* RidiculouslyCuteCritter: The Pikkards, which not only appear in every game, but also represent the series in ''[[CrisisCrossover Alternative Saga]]''.
* TheRival: Chester, in ''The Oath in Felghana'' only, as he's not a boss in the original ''Ys III''; Geis in ''Ark of Napishtim'' and ''SEVEN''. Geis joins Adol's party after [[DefeatMeansFriendship losing a duel with him]] in his latter appearance.
* RoaringRampageOfRevenge: [[spoiler:Chester]] goes on this after learning the truth about [[spoiler:the destruction of his village.]]
* SadlyMythtaken: Ys is supposed to be an city swallowed by the ocean. It's the floating island in the game.
** There is a sunken city in ''The Ark of Napishtim'', though, more based on Atlantis. Legend also tells of the "Atlas Continent".
* SamusIsAGirl: [[spoiler:Dularn is a girl.]]
* ScamReligion: [[spoiler:Nikolas Garland admits that the religion that he preaches, the Romun Empire's religion, was created to scare children after revealing himself to be bad. If he is being truthful, the currently practiced religion in the Romun Empire is this.]]
* ScarfOfAssKicking: Adol dons one in ''The Oath in Felghana'' and, in most games set after it, he still has it. Chester's redesign for ''Oath'' also includes one so you know he means business.
* SealedEvilInACan: Darm in ''Ys II'', Galbalan in ''Ys III'' and ''Oath'', Arem in ''Dawn'', Jabir in ''Ys V'', and [[spoiler:the Ark of Napishitim]] in ''Ys VI''.
* SequenceBreaking: In ''Ys Eternal'' (but not in later versions) it was possible to get the Silver Armor while you were still at Level 1 by entering the Mine, running away from everything and hoping you could get to the chest and back before something killed you. As the second best armor in the game, it made the beginning much easier. Later versions removed this by requiring the Treasure Box Key to be obtained in the Shrine Depths before you could open the chest.
** It's possible to do the same thing in ''VI'' (in fact, given the similarities, it could be an intentional ShoutOut) by entering the Limewater Cave as soon as you reach Canaan Island. Provided you're good at running away, this lets you get the Galba Armor and Shield (the second best in the game) much earlier than you're supposed to.
* ServantRace: The fairies that the Clan of Darkness manufactures are this.
* ShapeshifterModeLock: In ''Ys II'', you acquire a spell that allows you to become a demon and talk to other demons. Late in the game, you are cursed into a {{Palette Swap}}ed version of this form and cannot change back until you find the items necessary to break the curse. You also lose the ability to talk to monsters and most [=NPCs=]
* SheepInWolfsClothing: Keith Fact in ''Ys II'', who became a demon after [[DespairEventHorizon his sister died]]. However, he uses his new strength to fight for humanity. This is explained in ''Origin'', which shows that [[spoiler:his ancestor, Toal Fact, is fused with demon seeds, thus showing the origin of "bad genes" in the family.]]
* SheIsAllGrownUp: Terra, who told Adol she'd do just this.
* ShootTheMedicFirst: One of the robots in the ruined city of Kishgal in ''The Ark of Napishtim'' is a repair robot whose spells repair other bots. Of course, you could intercept its healing spell to get healed as well, but you will get healed for fewer hit points than a robot would get healed by the spell.
* ShouldersOfDoom: Gadis, Bami, and Gruda in ''The Dawn of Ys'' all sport large shoulder pads.
* ShoutOut:
** An achievement in the Steam version of ''Ys II'' uses an icon graphic styled to look like an 8-bit era text box. The text within reads [[VideoGame/DragonQuest "Fortune smiles upon thee!"]].
** Hitting villagers with the fireball spell sometimes produces humorous commentary. One character will say [[VideoGame/RiverCityRansom "BARF"]]. Another will say [[VideoGame/TheGoonies "Ouch! What do you do?"]]
** In the ''Ys I Chronicles'' version, using the Rod (for the Darm Tower mirrors) as an item will result in Adol attempting to short-circuit the rest of the game by chanting "[[Literature/HarryPotter Accio]] Books of Ys". It doesn't work.
** One of the demons that controls one of the gates in the Shrine of Solomon in Ys II requires a pass before it will raise the gate. It says "[[VideoGame/PapersPlease Passes, please.]]" in the Steam version.
** The page quote from ''The Oath of Felghana'' is paraphrased very slightly from the Music/BillyJoel song "Baby Grand."
** One roo in ''Ys: Origin'' is named Rootkit, a type of [[ComputerVirus malware]].
** Ys II Chronicles' English localization has shout outs to the [=TurboGrafx-CD=] version.
*** The first shout out is that Jade will say that he used to sell herbs, but has quit doing so in the English localization. He sold the herbs in the TGCD version.
*** The second shout out is where Zalem in the English localization of ''Ys II Chronicles'' states that she was forced to wear thicker clothes when Ramia Village used to be colder. In the North American TGCD version, she wears a toga that is much more conservative than the original Japanese version due to [[{{Bowdlerise}} Bowdlerisation]], and Ramia Village is as icy as the Ice Ridge of Noltia. The weather is much more temperate in ''Ys II Chronicles''.
* ShroudedInMyth: A thousand years after the events of Adol's life, stories of his exploits can be found throughout the entire world. Some branded him as a just and virtuous hero, and others as an agent of chaos and discord.
* ShyBlueHairedGirl: Feena is a major example.
* SinkingShipScenario: Adol often starts many games after surviving one of these.
* SmugSnake: Again, most villains. [[spoiler:Again, VideoGame/YsSeven has a lot of fun with this.]]
* SingleLineOfDescent: The ending of ''Ys II'' implies that the six people (who are not Lilia and the Goddesses) who speak with Adol after Darm's defeat are the only people with the bloodline of the six Priests left after 700 years (which would also imply that Jevah Tovah died shortly after Adol entered Darm Tower). Possibly justified by the fact that the demons were going out of their way to eliminate as many of the priests' descendants that they could find.
* SlaveRace: The Romun Empire sees sentient nonhumans like the Redhans as worthy only as slaves. Adol has to rescue them from this fate.
* SlippySlideyIceWorld: ''Ys Origin''[='=]s fourth area is actually a Slippy Slidey ''[[ShiftingSandLand Sand]]'' World. And it doesn't really make any more sense in context.
* SmallAnnoyingCreature: Nina, the synthetic fairy-type creature that hangs around Frieda in ''VideoGame/YsMemoriesOfCelceta''.
* SortingAlgorithmOfEvil: Played straight with mooks, but not necessarily true of bosses.
* SoundtrackDissonance: For example, the "Valley of Quicksand" theme is a laid-back Latin style "beach" or "surf" tune, played while, ExactlyWhatItSaysOnTheTin, you're in a harsh desert ridden with killer quicksand pits. And "Quatera Woods" sounds like the soundtrack for a peaceful walk in the park with your special someone, but the woods of Quatera are anything but a nature walk, with EverythingTryingToKillYou, even squirrels. And one of the worst offenders is "Crimson Wings", the Ice Mountain theme, which sounds like elevator jazz/muzak in the [=TurboGrafx-CD=] version, clashing with the song title as well, although in the SFC version and on the Perfect Collection album, it's much more upbeat.
** "Defend and Escape" from ''The Ark of Napishtim'', while musically sad, is played during a heated EscortMission sequence.
** The song "Anxiety" is anything but anxious-sounding.
** [[http://www.youtube.com/watch?v=3pdAXVdX74o "So Much For Today"]] from ''Ys I & II Chronicles'' is a cute, upbeat tune that plays when Adol [[GameOver is defeated]].
* TheSouthpaw: Chester is left-handed.
* SpellMyNameWithAnS: Between fan translations, multiple official translations, and Falcom's own official English names, there are few characters or places that ''don't'' fit this trope. An example would be the name of the crater in Esteria where Ys used to be before it rose into the sky. In Creator/{{Atlus}}'s translation, it has the [[ForeignSoundingGibberish vaguely French-sounding]] name Vageux-Vardette, but Creator/{{XSEED Games}}'s translation gives it the more unusual-sounding name Bagyu Ba'dead. Also see BlindIdiotTranslation above.
** The English TG-16 version, on the other hand, refers to the crater as "Clifton's Cliff".
** ''Ys III'' and ''Oath'' can be particularly bad about this, since each English version was produced ''independently'' of any other, with the ''Wanderers'' ones all being done simultaneously. The TG-16 version goes so far as to completely alter most of the place names and some of the characters. More generally, these differences are just spelling-related (like Dularn/Dulan/Duran, Valestein/Ballecetine, or Elena/Ellena).
* StandardStatusEffects: Poison, Dazed, Heavy, etc. in ''Ys IV'' and later games.
* StealthExpert: Raba in ''Ys I''.
* StormOfBlades: In ''Ys: The Oath in Felghana'', Dularn's attacks consist of this and BeamSpam.
* {{Stripperific}}: Zalem, the weapon shopkeeper in the original PC-88 version of ''Ys II'' and in ports and remakes that keep this outfit instead of [[{{Bowdlerise}} Bowdlerizing]] it. Epona's outfit in ''Origins''. Olha and Crevia in the [=PS2=] version of ''VI'' have hidden {{Stripperific}} moments. And Rose, the armor shopkeeper in ''The Ark of Napishtim''. Ursa and [[spoiler:Tia, after TheReveal]] in ''Ys SEVEN''. Bami in ''Ys: Memories of Celceta''. Dana in ''Ys VIII: Lacrimosa of Dana''.
* SuspiciousVideoGameGenerosity Every time you see a crystal in front of a path in ''SEVEN', you know a boss is coming up.
* SuperPoweredEvilSide: If your last name is Fact, then you definitely have one. [[spoiler:Eldeel in ''Ys: Memories of Celceta'' also has one]].
* SwordOfPlotAdvancement: The Silver Sword in I requires a sidequest (GuideDangIt!) to obtain and the game won't let you into Darm Tower until you have it and the accompanying shield and armor. The Hero's Sword in ''Mask of the Sun'' and all three Emelas swords in ''VI'' perform a similar role in their stories.
** The Cleria equipment in ''The Dawn of Ys'' also qualifies. It gets upgraded to the [[InfinityMinusOneSword Eldoran equipment]] which you need to damage Arem despite it not being the strongest gear.
** The Emelas swords in ''VI'' are required not only to fight with and use magic but are the keys that open certain doors around the islands [[spoiler: and are required to control the titular Ark]].
** The Brave Sword in ''Oath'' is the only weapon capable of harming TheDragon and BigBad. Fortunately, it's impossible to miss.
** The Cleria Sword in ''Origin'' (which the ending reveals to be the Silver Sword that appears in ''Ys I'') is the only weapon that can defeat the final boss in Toal's route. Fortunately, it's given to you automatically right before that battle.
* TacticalSuicideBoss: If Gelaldy in Ys II did not keep opening its mouth, it would be invulnerable.
* TakenForGranite: Dalles does this in ''Ys II'' and its prequel, ''Ys Origin''.
* TheHeavy: [[spoiler:Bishop Nikolas Garland]] in ''The Oath in Felghana'' and Gruda in ''The Dawn of Ys''.
* TheUnfought: [[spoiler:Count [=McGuire=] in ''Oath'']] isn't fought at all. After this DirtyCoward surrenders, he just comes to terms with what he was done and has a HeelFaceTurn. In ''The Dawn of Ys'', [[spoiler:Eldeel, who gets killed by Gruda right after he [[YouHaveOutlivedYourUsefulness has unwittingly fulfilled his purpose in the Clan of Darkness's plan]]]]. Rije in ''Ys V''.
* ThereWasADoor: Dogi the Wall-Crusher, especially in ''Ys IV: The Dawn of Ys''.
-->'''Kid:''' Look, it's unlocked. Why'd you break the wall, exactly?
-->'''Dogi:''' ...Sh...shut up! Kids should stay quiet!
* TokenMiniMoe: At least one in every game.
* TooAwesomeToUse: The resurrection items, the Timestop magic, the sword magic in ''Mask of the Sun'' (except for the Hero's Sword).
* TookALevelInBadass: Chester takes a massive one in the transition from ''III'' to ''Oath'', going from a story-only antagonist to ThatOneBoss. Also, ''Elena'', at least in secondary materials. She appears in promotional materials and in ''Alternative Saga'' with the Brave Sword and a knight's outfit not unlike her brother's.
* TranshumanTreachery: Dark Fact in ''Ys I'', who became a demon and Ys I's BigBad after [[spoiler:[[WoobieDestroyerOfWorlds his father's death at the hands of miners]].]] This is explained in ''Origin'', which shows that [[spoiler:his ancestor, Hugo Fact, is fused with demon seeds, thus showing the origin of "bad genes" in the family.]]
* TreacherousQuestGiver: [[spoiler:Dorman, who hires Adol in Ys V to go on the main quest, is actually one of the villains.]]
* TrueFinalBoss: [[spoiler:Cain Fact in Ys Origin, who only appears when you defeat Dalles as Toal, after unlocking Toal.]]
* TwentyBearAsses: Some of the quests in ''Ys: Memories of Celceta'' require you to fetch a certain number of a particular type of item.
* UncannyFamilyResemblance: Sara and Goban Tovah share their ancestor Yunica's hair color (and Jeba presumably had the same hair color before her hair turned gray), and Dark Fact had the same color hair as Hugo Fact before he ended up becoming more demonic (as seen in the artwork of him on XSEED's site for ''Chronicles'', in which he is fully human).
* {{Unobtainium}}: Cleria in ''I'', ''II'', and ''IV'', Raval in ''The Oath in Felghana'', and Emel/Emelas in ''The Ark of Napishtim''.
* UnspokenPlanGuarantee: Painfully subverted in ''Origin''. Toal's plan [[spoiler:to destroy the Black Pearl]] will mean his certain death. Reah's plan [[spoiler:to seal the Black Pearl]] will cause her and Feena to lose their powers and slumber for centuries. Partway through the game, Toal finds a third option that doesn't require one of them to make a HeroicSacrifice for the sake of the other, but doesn't explains what it is. After the final battle, [[spoiler: Reah implements her plan, with Toal lying wounded and exhausted from his battle with Darm/Cain Fact on the floor, begging her not to,]] leaving the third option forever unspoken and unexecuted.
* UnwinnableByMistake: It ''is'' possible to reach the first Zone of Lava boss without finding the Firewyrm's Amulet. However you'll be unable to outlast the damage from the lava during the boss fight itself.
* UnwittingPawn: In ''Ys III''/''Oath'', Adol gathers all statues containing the essence of [[BigBad Galbalan]]. Of course, this ineviably leads to Adol's handing those statues over to villains, who then use them to unseal Galbalan. In ''Ys V'', the crystals that Adol gathers throughout the game are pivotal to maintaining the seal on Kefin. He ends up giving them all to Dorman and Rieje due to Niena's being held hostage. Also, Eldeel in ''The Dawn of Ys''.
* VeryDefinitelyFinalDungeon: Every ''Ys'' game has one of these, with the exception of ''Origin'', in which the entire ''game'' is one of these.
* VideoGamePerversityPotential: In the Steam version of ''Ys I'' there are two achievements for sexually molesting Feena while rescuing her from the Shrine. The first ("Hey Baby, What's Your Width?") is done by crowding her into a narrow dead-end corridor on the way out so she can't get past you and pushing her up against the wall at the end until she complains you're scaring her. The second ("I Can't See You, But I Can Feel You", with the description '"Measure" Feena in the creepiest way possible') requires you to do so while wearing the Mask of Eyes (which lets you see secrets at the cost of hiding all [=NPCs=] and monsters). The achievement icons are pretty perverse too.
** Gets a hilarious CallBack in ''Ys II'' where there's an achievement for "measuring" Tarf. This time the achievement icon has a sign across the image saying "NO, I REFUSE TO DRAW THIS."
* VideoGameRemake: The first two games have been remade multiple times. The third game was re-imagined as a top-down game as ''Ys: The Oath in Felghana'', which was ported to the PSP and ''finally'' got an official translation on that system after the PC version got the typical NoExportForYou (though that version was later released in English itself). (The PSP port of ''Ys I & II Eternal'', ''Ys I & II Chronicles'', were localized in 2011.)
* VoluntaryShapeshifting: In some games, Adol gains the ability to transform into a Roo.
* WaifProphet: Isha in ''VI'', whose visions terrify her.
* WalkingTheEarth: ''Ys'' in general is kind of surprising about this. You'll do a lot of wandering around the various locales of the games, sure, but the actual ''distances'' tend to be moderately realistic and you never wander the whole planet in any game (because such journeys would take months). You never go from Altago to Romun and then take a brief jaunt to Kefin, for example; you're always limited to a geographical area that can realistically be traversed on foot. In fact, most of the games start with Adol on a ship or other conveyance after a long voyage to his new destination. (Dogi likes to point out how this rarely ends well for either of them.)
* WalletOfHolding: Adol can carry gold and ore in the tens or hundreds of thousands of units. It gets lampshaded in ''The Oath In Felghana'', where people wonder where you managed to store the large amounts of Raval ore you give them (in one case the amount is explicitly mentioned as being more than what is normally taken from the local mine in a ''month'').
* WeakSauceWeakness: The InfinityPlusOneSword is often useless against the BigBad, forcing you to switch to a certain lesser set of equipment.
** Apparently, silver is the only thing that can bypass the protection of Dark Fact's otherwise-impervious Cleria cape in ''Ys I'', which is why he, prior to the start of the game, steals and hoards every silver object he can get his hands on.
* WeCannotGoOnWithoutYou: If Feena were to die while being escorted in ''Eternal'' and all its remakes? That's it, you're done, [[spoiler:[[NiceJobBreakingItHero great job Adol, you just got a goddess killed]], no way to win now]].
* WellDoneSonGuy: [[spoiler:Hugo Fact]] in ''Origin''.
* WeatherControlMachine: [[spoiler:The Ark of Napishitim.]]
* WhatHappenedToTheMouse: In Yunica and Hugo's routes in ''Origin'', the ultimate fate of some characters is never mentioned (Toal and Epona in Yunica's, Kishgal in Hugo's).
** Raba's fate was left unaddressed for five games and '''sixteen years'''.
* WhereAreTheyNowEpilogue: The final moments of ''Lacrimosa of Dana'' details the party's moments after the end of the game.
* WhereTheHellIsSpringfield: A bit odd in that we have a map of Felghana in-game... but it ''doesn't'' appear on various world maps that have been put out over the years. Given the various parallelisms with the real world in the ''Ys'' setting and a few sparse hints in ''Oath'', the best guess most people have is that Felghana is meant to be the equivalent of Flanders or Switzerland (the former being properly placed near the sea and close to the real-life equivalent of Esteria, making the trip not too distant; the latter's Alps seems to have served as inspiration for the Elderm Mountains), and one point for Switzerland is the fact that it has a town named Rougemont, which Redmont is basically an Anglicized version of. Although it's ultimately still conjecture and nobody is exactly sure where one of the best-selling stories in the franchise ''actually takes place''.
** Finally averted with the release of ''Memories of Celceta'', which puts Felghana in Northern Germany, [[http://media.giantbomb.com/uploads/14/144097/2335500-mapcomparisons.jpg around Rostock]].
* WhipSword: Karion in ''Ys V'' uses this.
* WhiteHairBlackHeart: Dalles from ''Ys Origin''. His hair color is slightly blue but he has the personality down pat. In ''Ys: Memories of Celceta'', Eldeel and Gruda.
* WiseTree: Roda trees in Ys I, Origin, and Memories of Celceta.
* WithGreatPowerComesGreatInsanity: [[spoiler:After the demonic essence Dalles gave to Hugo Fact is activated, he literally goes mad with power.]] The latter's speech also becomes messed up and is indicated in the English translation with unusual capitalization. Fortunately, it goes away after [[spoiler:Epona]] snaps [[spoiler:him]] out of it. Subverted with [[spoiler:Toal, who despite having the demonic essence manages to hold onto his sanity through [[HeroicWillPower sheer willpower]].]]
* WithThisHerring: Played straight in most games (it wasn't until ''VI'' that you actually started with ''anything'') but averted in ''Dawn'' (which starts Adol off with the Cleria equipment). All the games since ''VI'' have given Adol a sword at the very least. Strangely, Adol doesn't even need to have a sword actually equipped to use one in ''Memories'' (though you're given your first sword right before you first enter combat, so you might as well equip it).
** To be fair, there's not much difference between starting with a sword/armor/shield and starting with the ''money'' to buy said sword/armor/shield. Although, one has to wonder, "just what happened to Adol's sword in ''Wanderers'', the one he used to kill the beast in the prologue/cutscene with, if he shows up in Redmont with absolutely no equipment at all?"
* WingedHumanoid: Eldeen civilization.
* WoobieDestroyerOfWorlds: Dark Fact in ''Ys I'', who [[TranshumanTreachery became a demon]] and the game's BigBad after [[spoiler:his father's death at the hands of miners]]. This is explained in ''Origin'', which shows that [[spoiler:his ancestor, Hugo Fact, is fused with demon seeds, thus showing the origin of "bad genes" in the family.]]
* WorldBuilding: Quite a bit. While it's not quite the most internally consistent world around, the large distances and realistic travel the protagonist does gives what might otherwise be isolated areas some realism. It makes sense that references to many of Adol's adventures wouldn't be understood or known about in places that are thousands of miles apart, just because it's the same world doesn't mean traveling is any easier in our own. More generally, subtle references and a similar underlying structure to the various magic systems and the occasional reoccurring character help tie things down.
* YouAreTooLate: No matter how fast you climb the bell tower, it is impossible to reach the top of the bell tower before Dalles is ready to complete the sacrificial ritual. [[spoiler:Maria still lives, but not due to any action on your part]].
** In ''The Oath in Felghana'', [[spoiler:after handing over the statues to Chester, Adol sets off to Valestein Castle to recollect them. He does manage to find them, but not before Chester uses their powers to turn nearly everyone in the castle to mindless monsters, and those powers are transferred completely to Galbalan]].
* YouKilledMyFather: Unusually for this trope, Yunica didn't know about this until Kishgal ''told her'' that he had killed her father.
* YouShallNotPass
* ZettaiRyouiki: Elena in her badass look for ''Alternative Saga''.
** Reah's outfit in ''Origin'' is a high Grade B.

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