%%
%% If an example has to do with a song, but not its in-game BGA, chart, or other game-specific elements, you may want to consider instead putting it under Music/Vocaloid or the song artist's page, if any.
%%
[[quoteright:250:http://static.tvtropes.org/pmwiki/pub/images/projectdiva_9958.png]]
[[caption-width-right:250:Hatsune Miku and her merry friends.[[labelnote:*]]From left to right, Kagamine Len and Rin, Hatsune Miku, and Megurine Luka. Not pictured: Kaito and Meiko.[[/labelnote]]]]

--->''It started with one dot...''

''Hatsune Miku: Project DIVA'' is a series of {{Vocaloid}}-themed {{rhythm game}}s released by {{Sega}}. As the title may very vaguely imply, Miku is front and center, although the other Crypton Vocaloids, Rin, Len, Luka, Meiko, and Kaito, get their share of the spotlight, as well.

The aim of the game is simple. Notes fly toward stationary targets on screen and you press their corresponding buttons when they overlap the markers. This task is spiced up by detailed, unique 3D music videos for each song, as well as quite frankly ridiculous bonus difficulties. The series finally made its overseas debut in August 2013 with ''Project DIVA F'', with the budget re-release of the Vita version following in 2014, but the other games are relatively import-friendly. ''Project mirai'' finally made its way over with the release of ''mirai DX'' in 2015, so 3DS players can rejoice, too!

!!!Main series games
* ''Hatsune Miku: Project DIVA'' (PSP, 2009)
** ''Hatsune Miku: Project DIVA Dreamy Theater'' (PS3, 2010)[[labelnote:*]]PSP connectivity DLC that lets you play unlocked songs in HD.[[/labelnote]]
* ''Hatsune Miku: Project DIVA Arcade'' ([[ExactlyWhatItSaysOnTheTin Arcade]], 2010)
** ''Hatsune Miku: Project DIVA Arcade Future Tone'' (Arcade, 2014)
* ''Hatsune Miku: Project DIVA'' ''[=2nd=]'' (PSP, 2010)
** ''Hatsune Miku: Project DIVA'' ''[=2nd=]''''[[UpdatedRerelease #]]'' (PSP, 2011)
** ''Hatsune Miku: Project DIVA Dreamy Theater 2nd'' (PS3, 2011)
* ''Hatsune Miku: Project DIVA extend'' (PSP, 2011)
** ''Hatsune Miku: Project DIVA Dreamy Theater Extend'' (PS3, 2012)
* ''Hatsune Miku: Project DIVA '' (Vita, 2012)''[[labelnote:*]]Released in English in 2014[[/labelnote]]
** ''Hatsune Miku: Project DIVA'' ''[[UpdatedRerelease F]]''[[labelnote:*]]Note the use of the capital F rather than a fortissimo[[/labelnote]] (PS3, 2013)
** ''Hatsune Miku: Project DIVA :'' ''[[UpdatedRerelease Best Price Edition]]'' (Vita, 2013) [[labelnote:*]]A re-release of in the same ilk as the # version of 2nd, with updated graphics and added content.[[/labelnote]]
* ''Hatsune Miku: Project DIVA F'' ''[=2nd=]''[[labelnote:*]]Both PS3 and Vita releases labelled as F[[/labelnote]] (PS3/Vita, 2014)

!!!Spin-off titles
* ''Hatsune Miku and Future Stars: Project mirai'' (3DS, 2012)
* ''Miku Flick'' (iOS, 2012)
* ''Miku'' ''[=Flick/02=]'' (iOS, 2012)
* ''Hatsune Miku: Project mirai 2'' (3DS, 2013)
* ''Hatsune Miku: Project mirai Deluxe'' (3DS, 2015)
** ''Hatsune Miku: Project mirai DX'' (3DS, 2015) [[labelnote:*]]English version of mirai Deluxe[[/labelnote]]
----

!This series provides examples of:
* ArcNumber: 39, pronounced san-kyu, (like "Thank You") can also be pronounced as mi-ku,[[labelnote:*]]Japanese is wacky like that.[[/labelnote]] and is thus usually associated with Hatsune Miku and winds up showing up several times throughout the series. Taken to meta level with ''Dreamy Theater 2nd'', which costs ''3900'' yen on the PSN Store. Its file size? ''3939 MB''.
** This was taken further with Miku's anniversary song, 39, which appears in Project Diva F and Arcade. The subtitles LampshadeHanging it with, whenever she sings san-kyu, the subtitles reading 'THANK YOU (39)'.
* AntiFrustrationFeatures:
** On 2nd, Extend and F 2nd, you can unlock anything you already have on the previous game by simply transferring the save data. With F 2nd, this includes the ability to download the Extra Characters DLC.
*** A additional feature for F 2nd's save data is that it can be transferred between versions, automatically cloud saving when needed.
** On ''Project Diva F 2nd'', all the Diva rooms are unlocked automatically, instead of requiring you to complete a certain song on NORMAL, and most items for the mode are unlocked through progression in that mode.
** Want to know how to unlock a particular bonus costume in ''F 2nd''? Each song has a unlock count, plus a new Information Board, which outright explains every single unlockable you still need to get in plain terms.
* ArtEvolution:
** Dreamy Theater and Arcade have remastered PVs, compared to the PSP version, for every single song, using new high-definition versions of the models.
*** F 2nd takes this one step further, with some songs having completely new music videos, and others having remixed music videos which add Chance Time Events and/or extra 'guest' performers.
** An interesting ongoing example of this trope happens with ''Sekiranun Graffiti'', where every single version, currently up to eight, of the PV has the stage modified to display the title logo of the game it's from, meaning you can indentify the song's source within less than thirty seconds of the song beginning.
* AscendedMeme:
** Hachune Miku appears in the intro and tutorial stages, as well as a shooting game in some installments, in all the Project Diva games. Tako Luka also appears in the intro for ''Project Diva 2nd'' and in several songs in ''Project Diva F 2nd''.
** The Tutorial song is "Ievan Polkka", which has no dancer selectable, instead the only 'dancing' is Hachune Miku waving a leek in a circular motion, referencing the Leek Spin meme.
** Akita Neru and Yowane Haku appear in Project Diva 2nd and Extend alongside the official Vocaloids, with Kasane Teto as a DLC-only character, with all three being DLC in ''Project Diva F''.
** One of the songs in ''Project Diva F'' is daniwellP's Nyanyanyanyanyanyanya. Yes, a 'short' version of the Nyan Cat meme tune is in Project Diva.
* AllJustADream:
** "Gigantic Girl"'s music video, featuring a [[ExactlyWhatItSaysOnTheTin giant-sized Miku]] ''fighting Godzilla'', is all in her head.
** "Kagerou Days" music video, where Miku was in a concert, then suddenly a spotlight drops onto her, waking her up with a surprise. In the Chance Time event, the whole music video now goes to a different scene, and the entire thing becomes a DreamWithinADream. This version has gone [[GroundhogDayLoop Final Destination over and over and over again]]! All because of that black cat.
*** Notably, "Kagerou Days" is the only PV in the series to have two completely different scenes.
* AnInteriorDesignerIsYou: In most of the games, there's the Diva Room, which lets you decorate the Vocaloids' rooms.
* AndYourRewardIsClothes:
** So very, very much. Each game has ''massive'' amounts of costumes (called "modules") to unlock. At least half the modules belong to Miku in each game. Taken to crazy levels with "Senbonzakura" in ''Project Diva F'', which requires you to play the song multiple times to unlock all of the modules from it.
** Some of the DLC in Project Diva F 2nd is various outfits, including three costumes for characters who are ALREADY DLC, and one who was merged into another character as of Project Diva F. Notably, one of the DLC costumes in this set is new and exclusive to Project Diva F 2nd.
* AndYourRewardIsInteriorDecorating:
** The games with the Diva Room feature also unlock furniture pieces and room themes though performance whenever you complete a stage at NORMAL or higher difficulty.
** For some songs, usually the first song to feature a Vocaloid, you also unlock their room, so you can visit any of the Vocaloids.
*** This is removed as of ''F 2nd'', with the main game and the Diva Room being segregated, with both room items and Diva rooms unlocking through normal use of the feature.
*** In ''Project Diva F'' and ''Project Diva F 2nd'', Haku, Teto and Neru all use a single room, that is unlocked with downloading them.
* AssimilationPlot: The story of [[LongTitle "This is the Happiness and Peace of Mind Committee"]] from ''F'' ''[=2nd=]''. A representative of said committee, the Siren (Miku), wants everyone in the world to be completely, unconditionally, and equally happy. Anyone who isn't... well, it won't [[NightmareFuel end]] [[ParanoiaFuel well]].
* BilingualBonus: In ''F 2nd'' Western release, the lyrics can now be set to translated English, while the vocals stay sung in Japanese.
** Megurine Luka, full stop. In ''F 2nd'', she sings Yankee Doodle Dandy, and ''DYE'' from F was sung in terrible, but understandable, English. Her unlockable wall banner even declares her as 'Bilingual Babe'.
* BreakUpSong: "Koi wa Sensou"[[labelnote:*]]"Love is War"[[/labelnote]] from the first game is about a particularly bad break-up, sung from the break-uppee's perspective. "Just Be Friends" from ''[=2nd=]'' and ''extend'' is a softer example, sung from the break-upper's perspective.
* CallBack:
** In "Time Machine", the two toys that caused the dream from "Gigantic Girl" are sat on the floor of the treehouse.
** ''Project Diva F 2nd'' is full of call backs, in that over two thirds of the songs are from the PSP games.
* CatGirl: The Nyanko Module. Notably, for it's appearance in ''F 2nd'', the ears and tail are constantly twitching and moving.
** There are also several, mostly static, parts in ''F'' and ''F 2nd'' including rabbit, dog, fox and cat parts, with ''F 2nd'' adding parts for a nekomata and nine-tailed fox.
* ColourCodedForYourConvenience: The colors of the melody icons are obviously the PlayStation symbols' colors. The arrow ("W") notes are filled with colors to prevent blending with other types of icons. Hold notes have colored outlines. Star notes in the F series are yellow.
** And of course, the difficulties are in PlayStation colors as well: Green "Easy", Blue "Normal", Pink "Hard", Red "Extreme".
* ColorCodedCharacters:
** Miku = Cyan
** Rin = Yellow
** Len = Orange (specific character color)/ Yellow (since they're "twins")
** Luka = Pink
** KAITO = Blue
** MEIKO = Red/ Orange (as Sakine Meiko)
** Haku = Purple
** Neru = Yellow
** Teto = Red
* ContemplateOurNavels: The lyrics of "DYE" from '''', in that distinctly Engrishy way.
* ConsoleCameo: The music video for "Remote Controller" has a Dreamcast controller as one of the controllers.
* CreditsMedley: The song playing during the credits sequence of ''F'' is a medley of instrumental versions of some of the game songs.
* CreepyDoll: Present in "Ashes to Ashes" in F.
* CrucifiedHeroShot: The player character in "Black★Rock Shooter". They get better.
* CuteMute: Teto outside of songs. In some games, Haku and Neru are also mute except when you clear a stage.
* DamnYouMuscleMemory:
** If you played too much F [=2nd=] on the Vita with analog sticks as Scratches, see if you can finish any Hard/Extreme songs in F without touching the stick.
*** On the flipside, Scratch notes were very forgiving, being able to be done by simply flicking the stick constantly on F - they couldn't be hit with the "safe" designation, meaning you just had to hit them in a reasonable area of their appearance to be given a "fine". F 2nd now actually requires you to properly hit the note to get a "fine" or "cool", making it much harder to complete Technical Zones or get a Perfect.
** ''DIVA Arcade'' uses a button layout consisting of four buttons in a horizontal line, rather than the two sets of diamonds used by the console and handheld games. Anyone used to the latter, especially someone coming off playing on one of the limited edition arcade-style controllers, will be in for a rude awakening when they attempt ''Arcade''.
* DealWithTheDevil: Of a sorts in Dream-Eating Monochrome Baku. Len, a baku (read: dream-eating spirit), makes a contract with a girl to eat all of her bad dreams. After he finishes eating her bad dreams, he continues eating her dreams until the girl can't dream anymore.
* TheDevTeamThinksOfEverything:
** There are several songs in F series where, even though a character may not appear as a selectable module, s/he will still appear in the song. If you select a Vocaloid other than the default, the default character will replace the selected one within the song. Taken to another level in "Rin-chan Now!", where the selected character's name and color appears correctly on their Twitter-like feed, even Haku, Teto and Neru, as well as Sakine Meiko.
** In "God-Tier Tune," if you select a Kaito or Meiko module, they'll still have a super-deformed model to replace Miku's, despite not appearing in the song otherwise.
** Several modules in Project Diva F, like Linkage and [=FOnewearl=], have glow-in-the-dark light up panels built in.
** The Factory Tyrant module has moving gears on the wrists and ankles, as well as a spinning disc on the chest. Even in shots where the scene is otherwise static, they never stop moving.
** A new element in the new PV for ''Intense Song Of Hatsune Miku'', as a Chance Time Bonus, is that the notes for the following rapid note sequence have holographic markers added.
** The new Language option on ''Project Diva F 2nd'' has three options, the original untranslated japanese text, the same basic 'translation' as the previous game, and the new complete translation.
* DownloadableContent:
** New songs, new modules, et cetera. ''extend'' had most of ''[=2nd=]'''s DLC included.
** From ''[=2nd=]'' onwards, Yowane Haku, Akita Neru and Kasane Teto are available as bonus characters, with one or all of them included in the DLC packs available each game, if not the game itself.
** With Project Diva F on PS3, around a dozen extra songs added as post-release DLC with the Vita version are included with the DLC modules being assigned to the songs they represent, including ''Senbonzakura'' having a total of SEVEN costumes, which are unlocked by completing the song a total of TEN times on any difficulty.
** Two of the most iconic songs of Project Diva F, "ODDS & ENDS" and "Tell Your World" were added as Live Mode songs for Project Diva F 2nd.
*** Which was trumped for Miku's Anniversary DLC, as the ''Project Diva Extend'' opening song, ''Sekiranun Graffiti'' was brought back, with future DLC plans including ''Look This Way, Baby'' from ''Project Diva 2nd''
** All of the DLC skins for Project Diva F 2nd are available free... for 39 days from their release.
* {{Dualvertisement}}:
** The music video for "The MMORPG Addict's Anthem" debuted (and takes place) in ''VideoGame/PhantasyStarOnline2''. The Chance Time Event reward Miku gets is a Rappy Wedding Cake room item.
** The song "Black★Rock Shooter" is the theme song, and original basis of, [[Franchise/BlackRockShooter Black Rock Shooter itself!]]
** The Song "Tell Your World" was originally created for Google to advertise how Hatsune Miku has become a worldwide phenomeon. In the first Project Diva game to come to the West, the song is included. Say it with me. A song made to advertise Miku's popularity worldwide, where she sings of how she wants to sing to everyone, is included in Miku's first worldwide game release, and also appears as Live Mode DLC for the second.
* DubNameChange: A handful of song names in F got... weird translations. "Left Behind City" became "Urbandonment", "Divine Comedy" became "God-Tier Tune", and "Netgame Addicts Sprechchor" (which was already its official English title according to the Japanese version, no less) became "The MMORPG Addict's Anthem", to name a few.
** With F 2nd, this was essential, due to the song "Genga Spoofing". The easy translation would be "[[Franchise/POKeMON Gengar]] Spoofing", but, obviously, with this being a SEGA game on a Sony console... They translated it as "Doubleganger"...
* DuetBonding: "World's End Dancehall" from '''' has Miku and Luka facing off in a heated dance battle, only for them to hit it off at the end when they realise the crowd loves it.
* EarlyInstallmentWeirdness:
** Those used to later games may be put off by the first game's lack of Extreme mode, hold and arrow notes, and songs that ''aren't'' performed by Miku. Some music videos are also just slideshows, and the pass/fail system is entirely dependent on your score, both things that were gone by ''Project Diva 2nd''.
** Games before ''F'' did not contain star notes, Technical Zones, Chance Time bonus scenes, customization items... or rock paper scissors.
** Even worse with ''Project Diva Arcade'', which has points where you need to hit two notes at once and a slide note.
** ''Project Diva F 2nd'' adds two new types of star note, one of which requires you to scratch two-fingered, the other requiring you to complete a combo, often slightly out of tune with the song itself.
*** The new star note mechanic also ties into Chance Time, where you can actually ''CANCEL'' the bonus animation by doing the final star note with both fingers or analogue sticks.
* EasyModeMockery: Playing on the Easy difficulty in ''F'' and ''F 2nd'' prevents you from unlocking the Hard versions of songs, and some modules and items. Additionally, if you choose to use a help item, the rank shown will have a green heart beside it. Some help items go further and automatically give you the CHEAP/LOUSY/SO CLOSE rating regardless of performance, preventing you from unlocking new songs.
** One of the cheapest, in gaming terms, help items was removed for ''F 2nd'', which allowed you to, on any difficulty, play it with only the basic note types of Easy Mode.
* {{Engrish}}: As the Vocaloid 3 modules were only finished a few weeks before the release of ''Project Diva F'' in English, all the songs but one are only translated in that Romanji is used on the karaoke bar. Also, All the Vocaloids, when, as of recent updates, all of them have a english voice bank, still use the original engrish victory announcements. Several fans of Project Diva have took it upon themselves to remix, using the Vocaloid 3 English voicebank, several of the songs from ''Project Diva F'' and have so far shown almost half the songs sound just as good, if not better, in english!
** This is slightly averted by the song 'DYE', in that the song is sung in very poor Engrish throughout, so didn't need translating.
** The lack of english is averted, in a very cute fashion, in ''F 2nd''... Luka uses the english Yankee Doodle chant for the new minigame, in all regions, purely since she's always spoken passable english!
*** Then averted even more in a shocking move, as SEGA announced that the subtitles now have an option on most of the songs to translate faithfully the lyrics into full English, approved by Crypton and the original composers, for the western release!
* FakeLongevity: Unlocking 100% of the Modules in the original PSP game requires clearing all of the songs sung by Miku (32 of the 36) and getting either 5 Normals or 1 Great... ''per character''! This also has to be done six times, using a character's original module for each run, making it almost a waste to use any of Miku's other costumes.
** ''Project Diva F 2nd'' restores this aspect somewhat with the Information Board challenges, which include cumulative score or note totals. Notably, some of the challenges are to get NO notes of one of the types.
* {{Fanservice}}: Every game is obligated to have one song that features the lead girls in swimsuits, such as "Summer Idol" from F. [[NintendoHard Doesn't stop it from being one of the hardest songs, though.]]
** As mentioned in ShoutOut further down, the games are filled with references to SEGA's original properties, with each game having at least one costume based on a SEGA franchise.
* FissionMailed: Obtaining the Chance Time bonus in "Sadistic.Music Factory" leads to the bad ending that involves failing to escape from the factory.
* FollowTheLeader:
** 2013 saw the release of ''Megpoid the Music#'', a similar rhythm game for the PSP featuring the popular {{Vocaloid}} GUMI.
** Gumi also appears in selected songs in ''Project mirai'', however she has not been licensed for ''Project Diva'' itself.
** And in 2014, ''IA/VT Colorful'' does the same for IA on the Vita, courtesy of Marvelous AQL.
* GameplayGrading: Being a rhythm game series, this is obviously present, though with worded grades rather than letter grades. From worst to best, they are MISSTAKE (DROPOUT in F's English release)[[labelnote:*]]fail to finish a song[[/labelnote]], CHEAP (LOUSY in F's English release)[[labelnote:*]]finish a song but fail to get enough rank points[[/labelnote]], STANDARD, GREAT, EXCELLENT, and PERFECT.
* GrassIsGreener: "Negaposi*Continues". Turns out living in a video game isn't all it's cracked up to be.
* GuideDangIt: Averted in ''F 2nd''. A new feature adds a ''Information Board'' which tells you what unlockables you can unlock in a song, in a easy to read format.
* HopeSproutsEternal: Kami Kioku/God-Tier Tune revolves around chibi Vocaloids tending to the last plant on Earth in order to awaken Goddess Miku.
* HotterAndSexier: F and F2nd bring us much more fanservice-geared songs such as [[IntercourseWithYou "Hm? Ah, Yes.",]] [[AbsoluteCleavage "Nostalogic",]] [[FemmeFatale "Blackjack",]] and "Cat Walk Envy".
* IntercourseWithYou: ''A lot'' of the songs. To name a few, there's "magnet", "Romeo & Cinderella", "Hm? Ah, Yes.", "Iroha Uta"...
* JigglePhysics:
** Meiko and Luka got it going on in ''''. Even the modestly-endowed Miku gets in on the action, depending on the outfit.
** The game even uses some jiggle physics on the hair of Miku, Luka, Haku and Neru, so their ponytails bob about almost realistically.
* LeaningOnTheFourthWall:
** In the intro for ''Project Diva F'', The [=DX7=] synthesizer is uncovered, gathering dust, that appeared in the PSP intros, and Miku is depicted as moving on, reflecting the fact ''F'' and ''F 2nd'' are [=PS3=] and Vita games, instead of the original system of a [=PSP=] game alongside a Dreamy Theatre upscaling program.
** Expanding from this is that the first three games are portrayed as being set at a exclusive academy, while Project Diva F and F 2nd are set after they have graduated, with the iconic synthesizer absent completely from ''F 2nd''.
*** In ''Sakura no Ame'' in Project Diva F 2nd, Miku is shown walking around the school featured in the intros, with several locations seen in the various intros shown prominently.
** One of the Gadget items for ''Project Diva F'' is the plainly named ''Project Diva Arcade Machine'', which is a genuine arcade cabinet for ''Project Diva Arcade'', which can be used to play the credits game constantly. Annoyingly, The Gadget list misnames it as 'Game Console' when selected in the Diva Room.
** The words and music for ''The Disappearance Of Hatsune Miku'' and ''Tell Your World'' are incredibly meta, the first having her sing about how she's terrified of the end of the song, and the latter having Miku singing about the fact she's on the stage right now singing for the world.
*** ''Intense Song Of Hatsune Miku'' also has very meta lyrics, in that she outright declares that the song itself is a 'answer' song to ''Disappearance'', which talked of the end of her shelf life, declaring that she has no shelf life, as long as Vocaloid exists.
** The music video for ''Sadistic Music Factory'' is about someone having escaped a tyrannical factory owner. As the song continues, it's revealed that the person she's looking for is the player themselves!
** One of the new aids given for ''Intense Song Of Hatsune Miku'' is that, from halfway through the song, the music video itself, if you complete Chance Time, changes to allow you to more clearly see the arrangement of the notes.
* LicensedGame:
** In two ways. It's themed around the Crypton-produced Vocaloids (this unfortunately means no Gakupo, for instance) and a few fan derivatives, and technically, every single song is a licensed song, since they're preexisting songs made by producers who are not SEGA or even Crypton staff. The fact it uses so many licenses made the localization of ''Project Diva F'' a shock, especially since almost none of the songs are cut, only removing a special download-only version of [=PoPiPo=], presumably since SEGA couldn't renegotiate the rights to use Toro and Kuro.
*** A surprising licensing issue cropped up with ''Rain Of Cherry Blossoms'', in that it was unable to be licensed for inclusion in ANY games after the original ''Project Diva'' up until it appeared again, finally, in ''Project Diva F 2nd''.
** The inclusion of Akita Neru, Yowane Haku and Kasane Teto, as well as modules specifically for them, Sakine Meiko, Tako Luka and Hachune Miku is purely since piapro licensed every single one of them under the Crypton Future Media banner. Ever since, they have appeared, legally, complete with songs specific to them, in the Project Diva games. This licensing does not extend to use of Kasane Teto's voice, which is created using UTAU, which piapro cannot license, meaning she has no songs or bonus modules on any Project Diva game, and was not added to Project Diva Arcade until much later.
*** This was averted in F 2nd when she got a new Sweet Camouflage Jacket module, her first and only extra module.
** Gumi has only been licensed as a exclusive cameo character for ''Project Mirai 2'' and ''Project Mirai Remix'' and has no songs that she sings herself. She has not yet been licensed for any Project Diva game.
** Project Diva F 2nd uses piapro's own music archiving website to archive the music for Edit Mode, allowing gamers to optionally attach the song file to a PV, removing one of the bugbears of Edit Mode, namely that you can't always find the song.
** Another licensing problem came with F and F 2nd coming out in English at all, since they needed to get approval to do the english lyrics. When Project Diva F was successful beyond all expectations, Crypton approved SEGA meeting with the composers to create the licensed translations the fans wanted.
* LifeMeter: Like in many other rhythm games. However, you also need to finish the song with enough Grade Points (or, in earlier games, at least a certain percentage of COOL or GOOD judgements) to clear the song properly.
* LogoJoke: The logo screen has Miku singing "Se-gaaaa!", similar to how older Sega games had the "Se-gaaaa!" yell. Later games had Rin, Len, Luka, Kaito and Meiko join in randomly.
* LoveTriangle: "Acute" from F has one between Kaito, Miku, and Luka. As if to drive the point home, the stage is even shaped like a triangle! It doesn't end well, either.
* LuckBasedMission: The room items in the original game are unlocked by random chance after clearing a song. Many of them require a Great but even then aren't a 100% guarantee.
** This was averted in F and F 2nd, where they are unlocked by simply completing the songs on NORMAL or higher.
* MaleGaze:
** Present in Meiko's song "Nostalogic" in ''Project Diva F''. The camera often locks on or swing pasts her midriff, rear, or chest.
** Made even more hilarious if you get the Chance Time for Nostalogic, which causes the camera to become glued to the player character's chest.
** Luka's "Blackjack" in ''F 2nd'' brings this back in full force.
* MercyInvincibility: In ''DIVA Arcade'', you're granted a brief period of "safety" at the beginning of the song; your LifeMeter is restrained from falling below a certain amount until the safety wears off.
* MotorMouth: To varying degrees based on the song, from short spurts in "Secret Police" to constant and nigh-indecipherable in "Rin-chan Now!", "Sadistic Music Factory" and "Ura-Omote Lovers". Most blatant in the infamous "Intense Song Of Hatsune Miku" from ''2nd'', the only song that makes you ''press notes as fast as Miku's singing''.
** ...which was confirmed to be coming to Project Diva F 2nd as of the final release trailer. Thankfully, about half the notes from the latter half of the song were removed, and there is only one long chain throughout the entire song, which includes one of the shortest Technical Zones in Project Diva history.
* MiniGameCredits: In ''F''[='=]s closing credits, you play as Hachune Miku, throwing leeks at the credits to score points. Amusingly, after you complete the game on NORMAL, you can buy an item that lets you play it whenever you want, and new features are unlocked as you play the credits game multiple times.
* {{Nerf}}: Between 2nd and F 2nd, "The Intense Song of Hatsune Miku" (Hatsune Miku no Gekishou) received a severe nerf in the sense that the abnormally long high-speed chains at the end of 2nd's version were replaced with a series of much shorter chains punctuated by a few spaced-out notes. The song is still difficult, but not nearly as much. It's probably because of this that in F 2nd it became the second-to-last song instead of the final, of which F 2nd's is [[NintendoHard definitely no slouch]].
** Notably, ''Intense Song'' has it's last played notes on EXTREME be a 18-note Technical Zone which goes by at the same speed as the original ''Extend'' version's chains... and this one isn't one single type of note.
** And the Arcade version's last notes are a chain which literally has you needing to dance your hands over ALL FOUR NOTES, with seemingly three notes at once needing to be played. Two hands, three notes. Surprisingly, Some players HAVE managed it.
* NintendoHard:
** Extreme mode is this by the bucketloads. Special mention goes to ''[=2nd=]'''s absolutely ''evil'' [[http://www.youtube.com/watch?v=KE2DN9ztRYI final song.]] It's back in ''F 2nd'', but the difficulty has been dialled down significantly.
** Many of the MotorMouth songs are considered to be this, due to the much faster note speed.
** Even if a song isn't insanely fast it can still be very difficult on higher difficulties if the tempo isn't consistent or the beat follows the background rather than the melody.
** If you see Music/{{cosMo}} as the composer, it will be hard. Oh yes, it WILL be hard.
* NostalgiaLevel:
** ''Project DIVA F'' ''[=2nd=]'' brings back updated versions of past songs, such as "Packaged" from the first game, "Romeo & Cinderella" and "Intense Song Of Hatsune Miku" from the second, and "A Thousand Years' Solo" from ''extend''...
** This extends to the modules in the same game, with confirmation of the Nyanko and Heart Hunter modules from the PSP games, the latter being well known due to it's use with the first game's rendition of "Two-Faced Lovers", which returns with the PV and module it used in ''extend''.
* OddballInTheSeries: ''DIVA Arcade'' takes a few liberties from its handheld and console counterparts:
** The buttons are arranged in a line, rather than a diamond like the signature [=PlayStation=] diamond. [[DamnYouMuscleMemory Anyone not accustomed to this button setup is advised to play on lower difficulties first to adapt to it.]]
** The [[MercyInvincibility safety mode]] at the beginning of each stage.
** The game runs at 60 frames per second instead of 30. Not even ''Project DIVA F'' on [=PlayStation=] 3 runs at more than 30 FPS.[[note]]You could play ''F'' on a 120 Hz TV, but it's only an artificial measure and will look inconsistent.[[/note]]
** Holds are no longer mandatory. Holding a hold note down simply gives you bonus points, up to 3000 per hold note if another note of the same button doesn't appear early enough to interrupt the hold.
** "Chord" notes now use different buttons. On harder difficulties, chords of 3 and 4 buttons are not uncommon.
** Normal mode actually uses all four buttons.
** The newer revisions of the game have a version of the star note from ''F'', indicated by a bar across the top of the control area, that you slide one direction or another to complete the note.
* OldSaveBonus:
** Having the original game's save on your memory stick will net you all of its costumes for free, plus an exclusive DIVA Room poster and title, in the sequel. Likewise, having a ''[=2nd=]'' save will get you all of its costumes and such for ''extend''.
** This unfortunately doesn't carry on through to Project Diva F, which retires all the costumes from the older games.
** However, with ''Project Diva F 2nd'', this comes back, in that any costumes you have unlocked in F are also unlocked on ''F 2nd''. The game however requires you have a save for your own region, a side-effect of the previous game being a global release.
* ProperTightsWithASkirt: Rin's school uniform module in ''F''.
* RelationshipValues: Every iteration of DIVA Room features these, with a separate gauge for each character. You can raise these with Item Events, giving them gifts, or simply interacting with them. However, in ''Project Diva F'' and ''F 2nd'', the Derivative Vocaloids do not have the gauges, due to the DLC only unlocking their module and limited voice data.
* RhythmGame: [[CaptainObvious Yes.]]
* ScoringPoints:
** The first scoring system is the traditional points system. You get points for hitting notes on time, and you also get bonus points for hitting notes during Chance Time and holding down notes.
** The other is the Grade Point system, which is simply an overall percentage of your note accuracy, with a few bonuses for completing Technical Sections and Chance Time.
* SelfImposedChallenge:
** Some of the rhythm game items you can choose will make the song harder in various ways, ranging from making targets appear much later and preventing recovery of your life meter.
** Songs in F ''[=2nd=]'' can make it even harder with multiple challenge items in one go! That's right! Can you ace "Intense Song" on Extreme with icons that appear later than normal, flowing in random directions at high speed?
** On another note, getting a Perfect. There's absolutely no gameplay benefit to it - no awards are given other than trophies in the Vita and PS3 games - but landing one is much harder than it sounds as long as the "safe" designation exists...
* SequelDifficultySpike: The final PSP entry, ''extend'', may very well be the hardest game in the series. Songs on Extreme are now filled with high-speed rapid chains.
* SharpDressedMan: Len's default outfit for "Monochrome Dream Eater" in F. Complete with a matching NiceHat.
* SheIsAllGrownUp: Rin's ''Future Style'' module.
* ShoutOut:
** "Remote Controller"'s BGA features a SegaDreamcast controller, which replaces the {{Famicom}} controllers in the original PV because you can probably guess how Creator/{{Sony}} would feel about Creator/{{Nintendo}} copyrights in games on their systems.
** ''Hm? Ah Yes...'' is a fractured version of Cinderella, complete with the 'clock striking at midnight' and 'glass slipper' motif, except Miku destroys the entire ballroom, instruments, clock and all.
** Uh oh! [[http://piapro.jp/t/WTTn It just got real!]] [[note]]Yep, that's the legit loading screen for Project DIVA F [=2nd=].[[/note]]
** Initally, the Project Diva intros featured a Yamaha [=DX7=] synthesizer somewhere in them, including Project Diva F revealing Miku's one has the voice settings for 37-39 read 'Best Friends Forever'. This same synthesizer is one of several instruments that are built into Miku's outfit. Unfortunately, in ''Project Diva F 2nd'', The [=DX7=] is not present.
** Being licensed by {{SEGA}}, every game is obligated to have at least one Module from a SEGA game. The first game featured outfits for Miku from VideoGame/{{Space Channel 5}} and VideoGame/ValkyriaChronicles, the second game had Rin's [=RoF=] Style, the outfit of the main character of VideoGame/ResonanceOfFate and Luka's VF Style from VideoGame/VirtuaFighter, Extend featured Miku's Sonic Style outfit for Franchise/SonicTheHedgehog's 20th anniversary, Miku's [[VideoGame/VirtualOn Fei]] [[VideoGame/SuperRobotWarsUX Yen]] 'costume' and Virtua Fighter outfits for Kaito, and F features a [[VideoGame/PuyoPuyo Arle Nadja]] costume for Rin, a Border Break Operator outfit for Meiko from VideoGame/BorderBreak, as well as [=FOnewearl=] Style for Miku from VideoGame/{{Phantasy Star Online 2}}.
** Due to it being used in one of the songs, the entire stage area of the ARKS colony from Phantasy Star Online 2 appears in Project Diva F's Edit Mode.
** The bonus level for the MiniGameCredits in F is called the {{Fantasy Zone}} Stage.
** In Project Diva ARCADE, There are versions of [[{{Videogame/Outrun}} Magical Sound Shower]], [[{{Videogame/Afterburner}} FINAL TAKE OFF]], and the theme song for {{Videogame/Quartet}} remixed with full vocals.
* SiblingRivalry: "Remote Control" in ''F'' just screams this for Rin and Len, though they most-often get along very well in their other duet songs.
* SillyLoveSongs: Several. "Melt" and "Ai Kotoba", for example.
* SleepCute: The end of the anime video of "World's End Umbrella".
** Also invoked by the Alarm Clock room item, in that the Vocaloid themselves goes to sleep so that, when the alarm goes off, they wake up with you.
* StalkerWithACrush: Miku and Luka big-time for Rin in "Rin-chan Now!"
* {{Stripperiffic}}: Some modules are borderline, but the clearest example is definitely Meiko's ''Blue Crystal'': Her breasts are covered only by a belt!
* StockShoutOut: In the '393 Quest' diva room theme, the message box above the bed will periodically display, "[[{{Videogame/Super Mario Bros}} Thank you Miku! But our diva is in another castle!]]"
** Notably, with the '393 Quest F' version, the line is changed to read 'Stage' instead of 'Castle', and is the only english string on any version of the theme, the rest of the text being untranslated.
* ThreeMinutesOfWrithing: Some of the music videos are this. To name some examples, there's "magnet" and "Change me" from ''[=2nd=]'', as well as "Hm? Ah, Yes." and "Nostalogic" from ''''.
* TokenMiniMoe: Rin and Len, of course.
* TranslationCorrection: Some slight instances of Engrish were corrected for the English release of ''F''. For example, "Rest X Notes" seen during a Technical Zone became "Notes Left: X".
** For F 2nd, further translations were done, with the vague 'WORST' note designation now being called 'MISS', and the 'LOUSY' rating being replaced by the more optimistic 'SO CLOSE'.
* UpdatedRerelease: ''[=2nd#=]'' fixes several bugs and niggles, speeds up load times, and comes with a free DLC code that gives you all of ''extend'''s costumes to use. ''extend'' could be considered this to ''[=2nd=]'', especially seeing as how it's working title was ''Project DIVA 2.5''. In a more traditional example, ''F'' is a re-release of ''''.
* VariableMix: Missing a note in newer games will cause whatever vocals corresponding to that point in the music to not play. Miss notes repeatedly and the characters will sound like they forgot the lyrics.
* WhenSheSmiles: The opening movies for the games are some of the few instances where [[PerpetualFrowner Hachune Miku]] actually smiles.
* WholesomeCrossdresser: Len's Phoenix Moon module, a feminine kimono, and Rin's Ame module, a masculine happi coat, in ''F'', their default outfits for "Kagamine [=HachiHachi=] Flower Fight".
* WhoWearsShortShorts?: Miku's Yellow module in ''2nd'' and ''extend'', Rin and Len's sport-themed modules in ''F''.
* WordSaladLyrics: "[=PoPiPo=]"'s English verse is absolutely ''full'' of this.
-->''Let's take, you are lovin' it!''
-->''Vegetable juice''
-->''You must love this drink, I've decided now!''
-->''So take now, with true heart, vegetable juice''
-->''It costs just two dollars!''
* ZettaiRyouiki: Miku and Luka in their default outfits. Most of the other characters also get in on this with their optional modules. Even Len!

----