Anti-Climax Boss: The final song that you need to clear before getting the staff roll in mirai DX, "Watashi no Jikan", does not stand out in terms of difficulty in any way. This can come off as a disappointment to those who have played mainline DIVA games and were expecting a cosMo song as a final challenge.
Author's Saving Throw: F 2nd introduced Scratch Links, which easily drove themselves into Scrappy Mechanic territory for often being inaccurate to the song's timing and being unwieldy to manage. X fixed this by removing both Wide Scratch Notes and Scratch Links, returning to the F formula.
Releasing Future Tone on PS4, due to having virtually all the songs from every other release, with no confusing unlock system and some modules which haven't been seen since Project Diva Extend, making up for Project Diva X having a much smaller song list and excessive grinding to unlock anything.
Best Level Ever: "Secret Police," "World's End Dance Hall," and "Senbonzakura" are often cited as some of the best levels in F.
"Wintry Winds," "Two-Sided Lovers," "Kagerou Daze", and "Decorator" are all very popular in F 2nd.
"Hikkyou Sentai Urotander" gets a lot of love for being a lot more interesting and involved than most of the PVs in the game, having a very devilish chart that abuses a lot of Fake Difficulty for thematic purposes, and being the only non-medley song in the game that Kaito sings on. "Satisfaction" and "Amazing Dolce" are also popular for being really good Original Generation tracks, the latter also having an interesting and involved PV.
Contested Sequel: Due to a series of happenstance instances, F 2nd ended up being this way. After its predecessor F had been the first game since the original to have an entirely unique (i.e. with no songs reused from older games) setlist, F 2nd went back to series form and half of its songs were updated versions of songs from the PSP games. Series veterans either didn't mind (since this was par for the usual course for games other than F) or considered this lazy; making this even more divisive was that these were songs from games that had never made it outside Japan, so people who had played only the localized versions generally didn't mind at all and were even happy that they got to play songs they wouldn't have been able to otherwise, many of which were iconic fan favorites.
X being explicitly concert-esque PVs for the sake of being able to change the stage. Detractors claim that the lack of the more elaborate cinematic PVs isn't as entertaining nor as memorable as past games and is just an excuse for SEGA to be lazy, while defenders claim that the concert PVs are a way for SEGA to experiment with new gameplay styles that had yet to be seen in Project DIVA. It doesn't help that nearly all* There's exactly one returning non-Medley song, "The First Sound", and "LOL -lots of laugh-" can also be counted if Mirai is involved of the non-medley tracks are new additions that are mostly very well-liked songs that many would have preferred to have gotten cinematic PVs.
X is also probably the most Miku-oriented DIVA game to date; out of the 30 songs and Medleys that launched with the game, only four of them don't have Miku whatsoever. Rin, Len, and Luka get solos, MEIKO gets a trio with Rin and Len, and KAITO especially gets the short end of the stick; he has one song, and it has Miku in it! Naturally, fans of other Vocaloids were extremely displeased.
The lack of an actual Edit Mode riled up the Edit Mode fans, since X got Live Edit Mode in its place, which despite the name bears very little resemblance to Edit Mode, functioning more like AR concert mode from F and F 2nd.
X is also very heavily influenced by Magical Mirai; many of the songs that aren't Original Generation or Medleys use dances borrowed from the concert. Fans have taken this as SEGA being lazy and not bothering to create new dances for their game.
The medleys themselves are also a point of contention, as they tend to be Marathon Levels and include songs that fans would've liked to see as full levels on their own. Full versions of songs that debuted in medleys is a popular DLC request. The Ultimate Medley is the most contentious- fans are split on whether it's the best level ever, as it's comprised of the Final Boss songs from previous games (plus "Two-Sided Lovers"), or the laziest, as it borrows heavily from their old charts, is the game's only 10-star difficulty song (previous games typically had two), and doesn't include any new songs.
Counterpart Comparison: When "Brain Revolution Girl" came out with X, fans of F 2nd noticed right away how similar "Brain Revolution Girl"'s dance is to "Blackjack".
Crack Is Cheaper: Getting all of the outfits in Arcade costs what is effectively a small fortune due to being an arcade game. You're better off just grabbing what you like as opposed to getting as many as you can.
Mikudayo costs a ridiculous sum or requires significant effort to acquire when it isn't a DLC item. In the console version of F, it is the most expensive object in the game, requiring 393939 DP to purchase. In Arcade, it costs 1500 VP. To put that into perspective, the Swimsuits, traditionally among the most expensive items in the series, cost 1000 VP. The Mikudayo Skins are also at the steep price of 24 DIVA Tickets, which amounts to nearly a month of playing Arcade once a day.
Project Diva Future Tone itself, being around 8000 yen in price for the entire package. Admittedly, it's still cheaper than if you were to try to get all it's content on the actual arcade machine...
For a DLC minigame, "Hello Planet" had some pretty cool music, including this badass tune.
Ensemble Darkhorse: Gumi seems to be a popular addition to the series, judging by her Project Mirai reaction.
Ear Worm: Too many to list. We are, after all, dealing with a rhythm game drenched in J-Pop.
Fridge Horror: Miku may be a tyrant in Sadistic.Music Factory, but she's also doing what she does simply for the sake of survival and escaping the factory (not getting the Chance Time bonus) means leaving her to starve to death!
In the mirai and Arcade PV for "1/6 -out of the gravity-", the moon segment of the song features strings of numbers flying in the background. There are two distinct strings among them; one is "6.673*10^-11*7.35*10^22/1738000^2 = 1.62m/s^2", or the equation that calculates the rate of acceleration for gravity on the moon. The other is "F=G*M*m/r^2", or the equation for Newton's universal law of gravitation.
In the mirai PV for "Kokoro", the lines of code that can be seen in the background when Rin receives a heart are written in Python.
Germans Love David Hasselhoff: Project mirai DX received lukewarm reception in Japan due to being just an Updated Re-release of Project mirai 2; why buy an entire new game just to get a few extra songs? In the West, it's the first Project mirai game to get a localized release and therefore was much better received.
It's Easy, so It Sucks: The lack of an Extreme difficulty level is one of the more common criticisms of the Project Mirai series. Even the addition of a "Super Hard" mode in DX fails to completely remedy the issue, since it only applies to 6 out of 48 songs and is still easier than the other games' Extreme difficulty.
Les Yay: Miku and Rin have a lot of this in the bonus materials for the games.
In Project Diva F and F 2nd, many of the Miku and Rin duet songs are heavily on the shipping, with Summer Idol having them consider going out with each other, and singing about how they like the other in Colorful X Melody.
And of course there's Luka and Miku in Magnet.
"Reverse Rainbow" has Miku kissing Rin (or Luka).
Love It or Hate It: Due to the design choices in X, PVs can be very hit or miss for a lot of fans.
Misplaced Nationalism: Due to some Unfortunate Implications of Japanese imperialism in "Senbonzakura", the song was removed for the Korean localization of Mirai DX.* The song is themed around the aggressive Taisho era. Although the PV is missing the incriminating Rising Sun flag and in fact contains a number of international flags as decoration, the post-independence Korean taegukgi among them, the vague wording of its lyrics can be feasibly construed to be about Japanese imperialist superiority, a subject that Korea is not very sympathetic towards.
The music video of Sadistic.Music Factory in F. The song itself could be pretty scary if one takes into account the lyrics (which are about being trapped in a factory and forced to make music for a mechanical tyrant for the rest of one's life) and the frightening robotic monotones, but combine all that with the Chance Time ending...
The Disappearance of Hatsune Miku, which has the song become garbled, as well as there being interference and odd glitches in Miku's movements, constantly. According to Word of God, Miku is being deleted while attempting to complete the song. The end of the song is when she finally crashes due to it.
Toward the end of Disappearance, Miku can be seen banging at the screen with her fists as though begging the player to help her. And at the end, she says a cheery goodbye before just...freezing up with a sad smile on her face as her voice speaks eerily in the background.
Thankfully averted with its answer song, The Intense Voice of Hatsune Miku, where the full length version's opening lyrics have Miku celebrate being alive, and she promptly finds a solution to the bad ending of Disappearance with one of the fastest denouements in Vocaloid history!
The Mikudayo head/costume is either hilarious or this, depending on taste.
The entire video of Kagerou Daze wherein Miku stumbles onto the site of an accident and repeatedly gets killed or injured trying to avoid the domino effect of everything that goes on. Sure, it's a Catapult Nightmare for each event so she knows how to avoid it next time, but the video still ends with an accident on stage and Miku vanishing completely.
The video of Nega Posi*Continues may definitely startle people the first time they see it as the game Miku is playing appears happy and normal at first, but when repeated continues occur, the game seems to be slowly corrupting, as the music slows and the colors become inverted, with Miku herself appearing to glitch, especially in a certain section that can come unexpected as static shows and Miku's head moves completely erratically.
"LOL-Lots of Laugh" in Mirai DX features a figure in a giant rabbit costume. The way it just suddenly appears in a deep close-up and just stares at the player for several seconds is just jarring.
Also in Mirai DX, the PV for "Matryoshka" features some creepy parts such as X-ray photos showing blood spreading through a person's lungs and wrists, a moment where a butterfly's wing is being cut off with a pair of scissors, and black-and-white pictures of the Nendoroid characters, each sporting a Slasher Smile, splattered with paint that makes it look like they are covered in blood.
Project Diva F 2nd is full of it, from English lyrics for all but one of the songs on the localized version to the return of some of the most famous (and infamous) songs and costumes from the PSP games.
Only to be averted in the next game, Mirai DX, which goes back to romaji lyrics and even the Japanese judgements of Cool/Fine/Safe/Sad/Worst over the western Cool/Good/Safe/Bad/Miss
The trope is re-invoked in X, with songs once again being translated to English.
Project Diva has been on a handheld and the PS3 ever since it was first released. When the series migrated to the PS4, with Project Diva X, however, it stayed true to its roots, and it's fanbase, by announcing it will be releasing first on Playstation Vita.
Averted for the US release of X, which will be released on Vita and PS4 simultaneously.
Project Diva Future Tone is a complete version of the arcade game as of mid-February 2016, missing only Ageage Again and it's associated module, which released in the last week of that month, with a grading system and other features that would be impossible on any other release.
Play the Game, Skip the Story: Pretty much no one plays X for the included story mode, which gets a lot of focus as being one of the game's highlights. Players who imported the game but are unable to read anything are thus subjected to cutscene padding interspersed between songs in Live Quest.
Scrappy Level: "Glasses," "Nyanyanyanyanyanyanya!" and "Stay With Me" are among the most-disliked songs in F.
F 2nd has less but "Clockwork Clown" is fairly panned by the players.
"LOL -lots of laughs-" in X gets a lot of flak for being pretty bland. This stands in particular contrast to its earlier appearance in Mirai, in which it had one of the more detailed and entertaining PVs in the game.
The star links in F 2nd weren't popular in players. Their timing is often inconsistent with the rest of the song, either much faster or much slower, which throws a lot of players off on their first try. As well as many, many tries after that. It was removed in X along with the wide star notes.
Chance Time in the original PSP game can feel like this at times as missing a single note on it in several songs is what could very easily separate a Standard and Great score. It's still this in later games due to heavily weighing one particular late-song section over the rest of the song, and irritatingly despite being absent from Project DIVA Arcade and DIVA Arcade Future Tune, it was put back into the Future Tone PS4 games.
Unlocking the Hard and Extreme charts for a song require clearing its Normal and Hard charts, respectively. This is a source of frustration for players who have played previous games in the series and are more than capable of playing Normal charts. It's also frustrating for players who find the two-button Normal charts bland in comparison to the four-button Hard and Extreme charts.
Notably, Project Diva Arcade and Future Tone both have four-button charts for Normal... And also has some songs missing Easy and/or Normal charts completely.
X's Live Quest mode forces you into a repetitive cycle of Level Grinding in order to gather crystals and unlock all the modules, most of which are Random Drops. Needless to say, its execution has proved near-universally unpopular.
Special Effect Failure: Whenever someone wears the Mikudayo head, but not the Module, their hair clips through the accessory if they have a hairstyle larger than it. Averted with the Module, which flat out replaces the character.
Surprise Difficulty: "Nyanyanyanyanyanyanya!" starts off with the memetic tune everyone knows and loves. Then the song starts to change in both style and tempo, at which point a lot of players' runs crash and burn.
Several of the F/F 2nd Trophies can become this not due to difficulty, but because of grinding. For example, both of them have a trophy requiring you to view all loading screen images... with over 100 different pictures this can make it really annoying waiting for the one final picture to show up. Another one requires you to view every single music video in the game, and using the playlist to play them automatically after each other doesn't work - you have to manually start each of them.
So many in mirai, due to a combination of vague Stamp descriptions and how reliant some Stamps are on factors beyond your control, such as Stamp #59, which you can kiss goodbye if you don't know anyone with the game or aren't online Friends with anyone who also has the game, or most of the Mirai Room Stamps, which are heavily based on random chance.
That One Boss: The Sphinx in "Hello Planet" for foreign players. It's a minor Puzzle Boss that asks a question, then allows the player to select from three answers; the right one will defeat the Sphinx and allow you to pass. If you mess up, the Sphinx laughs at you and throws you another question. Foreign players of 2nd and Extend will run into trouble due to the fact that being unable to read anything makes it significantly harder, and the order of the answers are randomized each time, preventing players from learning repeat questions and answers easily without the use of a translation guide.
As mentioned above, Sadistic.Music Factory and Negaposi*Continues in F. The beats are fast and the targets come almost constantly. You have to be on top of the rhythm the whole time, or else you'll find yourself failing out very quickly. Also, to a lesser degree, Nyanyanyanyanyanya! and Rin-chan Now. The former has constant shifts in tempo, while the latter is fairly chaotic, and both songs have intense Chance Times.
The Breather Level songs in F 2nd are preceded by Two-Sided Lovers and Envy Cat Walk, both demanding songs with lots of rapid notes. Being skilled at "dual-wielding" (Alternating notes between the button and its D-pad equivalent) is practically a necessity if the player hopes to successfully clear them. Furthermore, the final two songs in the game are The Intense Voice Of Hatsune Miku and 2D Dream Fever, which have "intense" BPM and chaotic charts. Although, the F 2nd version of Intense Voice is not quite as difficult as before, having removed all the longer chains, though it is still tricky to master.
Pretty much any cosMo song qualifies. In addition to Sadistic.Music Factory and The Intense Voice Of Hatsune Miku mentioned above, there's also the (in)famous "The Disappearance of Hatsune Miku" in the first game and extend (more so in the Miku Flick spinoff).
A new challenge item removes the short delay between a note arriving and needing to be played, meaning you'll fail a song, guaranteed, on your first try purely since there's no warning that you need to play the next note.
Arcade has its fair share of these, largely due to the alternate button layout and revised grading mechanics, but the one that takes the cake above the rest? Intense Voice. If you hated the Button Mashing carnival that the original chart was, Arcade dials it Up to Eleven with rapid-fire button switching and insane three-wide Wide Notes that alternate and still run at the same speed as the original chart.
Don't try to do any of the Motor Mouth songs on BREAK THE LIMIT difficulty in Miku Flick. Getting a Perfect is actually, literally impossible.
Mirai DX lacks many of these, mostly in part to the extremely lax grading system that considers "completing the song" a success, as opposed to Grade Points. However...
Despite only having Hard as a max difficulty, "Gaikotsu Gakudan to Riria" on button Hard Mode is significantly harder than even the six Super Hard charts, comparable to the main series' EXTREME difficulty in terms of being That One Level. The song's pace is fast and relentless, throwing drum chains and button switching at you every opportunity it gets, as well as being difficult to read. A specific middle section has a brief speed-up thrown in there just to screw with you, and in an SP Zone at that.
"Matryoshka" on Super Hard Button Mode can devolve into a battle for stamina, due it being both long and intense.
"glow" doesn't hide the fact that its middle section has to be flat-out memorized to do it without screwing up.
"Ageage Again" on Button Hard is surprisingly hard for a level 8 song, due to many two- and three-button patterns that have to be read as they scroll upwards or to the left, which can disorient players.
"1925" on Hard Mode loves throwing half-notes in your face. If you haven't picked up drumming yet, this is a crash-course lesson in it.
"Invisible" on Button-Super Hard is both fast and chaotic with little breathing room.
Hikkyou Sentai Urotander in X is an invoked instance of Fake Difficulty, so naturally it uses every dirty trick to screw with the player. It goes to show that you will not get a Perfect on it the first time you see the chart, and that's a guarantee, not a challenge.
"I'll Miku-Miku You! (For Reals)" in F 2nd, not due to difficulty (the song is fairly easy even on extreme difficulty), but due to the sheer number of times you have to complete it in order to unlock everything.
Possibly the That One Level to end all That One Levels: The 10★ Survival Course in Future Tone. Two Sided Lovers, 2D Dream Fever, Nega Posi Continues, and The Disappearance of Hatsune Miku on Extreme difficulty, capped off by The Intense Voice of Hatsune Miku on Extra Extreme difficulty. This in a mode where LIFE recovery is halved and you carry one health bar between every song, back to back to back to back to back. If you think you're up to the challenge, God bless your soul.
Visual Effects of Awesome: Present in many, many of the PVs, especially in F and F 2nd with "World's End Dance Hall" and "Meteor" being some of the best-looking videos in the series.
Where possible, these new PVs have been ported to Project Diva Arcade Future Tone. In more than one case, despite the fact the song was already in the game.
Woolseyism: Several instances of this in F. For example, one song that would literally translate to "Left-Behind City" was named Urbandonment, and Remote Control became Remote Controller, which is appropriate given the video has the Kagamines controlling each other through their devices.
In F 2nd, Narisumashi Genga, normally translated as "Spoofing Genga", became the punny-named Doubleganger. The "Hatsune Miku" outfit from DIVA, which is different from "Hatsune Miku Original", was also translated as "Ha2ne Miku" to avoid confusion and make them distinct.