* {{Defictionalization}}: Like with [[VisualNovel/NineHoursNinePersonsNineDoors the previous game]], a watch shaped like the game's bracelet was made available as a pre-order bonus (lethal injection needles and futuristic drugs not included).
** They're also a lot smaller and made of plastic, as opposed to the ones in the game which seem to be fairly large and look to be made of metal, with screens colored in a single color (Mine is yellow), rather than changing color display on a black screen, but still.
* ExecutiveMeddling: The reason why there's less horror elements in the game compared to the prequel was because the marketing department noticed people thought the prequel was too scary. According to WordOfGod,[[spoiler: [[{{Squick}} Dio was also planning on doing something worse to Clover when he catches her on the Luna path]]]].
* NamesTheSame: While this Dio [[Manga/JoJosBizarreAdventure cannot stop time or crush people with road rollers]], they're still both gigantic [[{{Jerkass}} Jerkasses]].
* NoDubForYou: In the European version. Seeing that 999 was never officially released in Europe, localizing this game was seen as too risky to pay extra for dual audio[[note]]They only got the Japanese dub[[/note]]. So in the end, [[NoExportForYou it could have been worse.]]
** NoExportForYou: The promotional watches that were for preorders of VLR were available in America only. Good news is, they decided to make plenty more after the game's release. The bad news is, they are only available during conventions and only if Aksys shows up.
* HeyItsThatVoice:
** Luna [[HellGirl ferries people to Hell]]. She's also [[NogizakaHarukaNoHimitsu absurdly cute]].
** [[Creator/YukariTamura Clover]] [[VisualNovel/HigurashiWhenTheyCry just can't have nice things.]]
*** [[SteinsGate Seriously!]]
** [[Creator/DaisukeOno K]]: [[spoiler:[[LightNovel/HaruhiSuzumiya Because they needed more espers.]]]]
*** Not the first time he's been involved in a [[UminekoNoNakuKoroNi murder mystery]].
** [[ChiakiOmigawa Phi]]: [[spoiler:[[EurekaSevenAO She just can't stay in one world line can she?]]]]
** [[Creator/AtsukoTanaka Alice]]: [[GhostInTheShell Her haircut looks awfully familiar too...]]
** The entire English cast [[http://25.media.tumblr.com/tumblr_mchmcbiW051rykwzao1_r1_1280.png is just one big Persona family reunion.]]
*** The above image is missing the J.B. Blanc connection, who voiced both Tenmyouji and Dojima/Namatame.
*** Phi will [[RedFactionArmageddon slip a knife between your ribs so fast you won't have time to soil yourself]] and [[TraumaCenter BELIEVES IN YOUR SUTURING SKILLS]].
*** K [[BlazBlue can't tell if you're trying]].
**** And on that note, [[BlazBlue I bet Zero III had a pretty fluffy tail.]]
*** Clover [[SoulCalibur was the reason you could never get Night Terror as Cervantes]].
*** Adding a connection to [[ShinMegamiTensei SMT]] as a whole, [[spoiler:Young!Akane]] is [[VideoGame/ShinMegamiTenseiIV Burroughs]], while doubting the might of Sigma's [[FinalFantasyXIII STEELGUARD]], and is a [[Franchise/MassEffect Reaper]] [[GamerPoop Doomsday Device]].
*** Sigma: Fucking puzzles! [[{{Catherine}} I'm going to solve the shit out of you!]]
*** When he's not participating in the Nonary Game, Dio is apparently trying to [[VideoGame/SengokuBasara unify Japan]] or [[VideoGame/LeagueOfLegends clear his name of being accused of killing an elder.]]
* SelfPlagiarism: Of ''VisualNovel/{{Ever17}}'', wholesale. Literally every plot twist is reused or reimagined in some way, except for [[spoiler:the recreation of a past event as a means to facilitate TimeTravel in order to SetRightWhatOnceWentWrong by saving a person who died in the first event]] (and that one was used in ''VisualNovel/NineHoursNinePersonsNineDoors'').

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