History VideoGame / ThirteenSentinelsAegisRim

** All of the protagonists are [[OutOfClothesExperience nude while piloting their Sentinels]] with various [[ShouldersUpNudity camera angles]] for both [[FemaleGaze male]] and [[MaleGaze female]] pilots, especially Iori and Megumi who show quite a lot of {{Sideboob}} in their portraits. Ironically downplayed by MsFanservice Chihiro Morimura, who's the only character show wearing clothes while inside a Sentinel, although the camera angle still focuses on her AbsoluteCleavage.

* KudzuPlot: With a non-linear presentation, thirteen individual character routes, all with numerous plot twists, [[UpToEleven as well as the]] story-branching that can also occur on the individual routes themselves, the narrative can become overwhelming if one does not follow or consult the chronological order in-game.

** Both Gouto and Ms. Morimura are shown to be suspicious for almost all routes due to [[spoiler:all the memory tampering and meddling they do. They both end up being GoodAllAlong]].

* FictionalCounterpart: Multiple movies are referenced within the story, but with fictionalized names. The "Deimos" film series is a clear parallel to ''Franchise/{{Godzilla}}'', and Minami mentions watching "E.X.T." multiple times in theaters, saying that it was a 1982 classic, the year that ''Film/ETTheExtraTerrestrial'' came out. Interestingly, the game doesn't do this for non-copyrited properties. In the same scene that Minami mentions "E.X.T.", she also specifically namedrops ''Literature/WarOfTheWorlds'' which, unlike E.T., is in the public domain.

* FictionalCounterpart: Multiple movies are referenced within the story, but with fictionalized names. The "Deimos" film series is a clear parallel to ''Franchise/{{Godzilla}}'', and Minami mentions watching "E.X.T." multiple times in theaters, saying that it was a 1982 classic, the year that ''Film/ETTheExtraTerrestrial'' came out. Interestingly, the game doesn't do this for non-copywritten properties. In the same scene that Minami mentions "E.X.T.", she also specifically namedrops ''Literature/WarOfTheWorlds'' which, unlike E.T., is in the public domain.

* FictionalCounterpart: Multiple movies are referenced within the story, but with fictionalized names. The "Deimos" film series is a clear parallel to ''Franchise/Godzilla'', and Minami mentions watching "E.X.T." multiple times in theaters, saying that it was a 1982 classic, the year that ''Film/ETTheExtraTerrestrial'' came out. Interestingly, the game doesn't do this for non-copywritten properties. In the same scene that Minami mentions "E.X.T.", she also specifically namedrops ''Literature/WarOfTheWorlds'' which, unlike E.T., is in the public domain.

* BraggingRightsReward: Minami's ''Research Notebook'' skill gives her a large stat bonus... on any stage you've previously S-ranked. Generally, if you've previously gotten S-rank on a stage there's nothing left for you to do there and you don't ''need'' the bonus.

* BuryYourGays: [[spoiler: BJ shows Hijiyama an audio log between older versions of himself and Okino from 2188. They say how much they love each other and want to spend more time together. The younger Hijiyama asks BJ to replay the log, only for BJ to instead play a log of a dying 2188 Hijiyama that starts with "Okino is dead". This is later subverted as Hijiyama and Okino end up surviving to the end of the game and their relationship still has the level of intimacy from their original selves.]]

* EveryoneMustBePaired: The game ends with the main cast having six [[OfficialCouple ironclad relationships]] ([[spoiler:Juro Kurabe/Megumi, Shu/Yuki, Nenji/Tomi, Ei/Iori, Natsuno/Miura, and Hijiyama/Okino]]) and one MaybeEverAfter ([[spoiler:Gouto/Shinonome]]). Given TheReveal that [[spoiler:the thirteen protagonists plus Okino and Tamao Kurabe are the only flesh-and-blood humans alive outside of the simulation]], that means that [[spoiler:at the end of the main story, there is only ''one living person'' who isn't in an implicit or explicit romance of some sort]].

* GroundhogDayLoop: Zig-zagged, each chapter in the adventure story usually repeats the same beginning several times. However, thought cloud items acquired from previous repeats carry over, and in-game time does move forward.

* CastAsAMask: Averted in the Japanese version, but for the English dub, there are a few situations. [[spoiler:Juro's friend, Shiba, is actually a version of Juro Izumi, but the two have different voice actors.]]

* CantTakeAnythingWithYou: PlayedWith, the protagonists lose their clothes when entering the cockpits of their Sentinels, but notably some characters keep some of their accessories. Iori, Yuki and Natsuno still have their hair decs, Shinonome still has bandages in her neck and head and Megumi, Tomi and Gouto all keep their glasses on. Even after TheReveal that [[spoiler:the characters are naked because they're [[PeopleJars actually in the pods they were born in]], which means the only way for them to see themselves until they exit those pods is via the viewscreens, which are generated within the simulation and thus mesh with their digital representations in the simulation; otherwise Tomi, Renya and Ryoko would each wonder why her eyesight works when she isn't wearing her glasses, Nenji's hair would feel noticeably different, since he can't style his hair in the pod, Miura was obviously not ''born'' with the massive forehead scar he got in the sim, and so on. They don't mention it in the text, though.]]

''13 Sentinels: Aegis Rim'' is a [[RealTimeStrategy Real Time Tactics]] AdventureGame developed by Creator/{{Vanillaware}} and published by Creator/{{Atlus}}. It was first teased in a preview video in July 2015 as a collaboration project between Atlus, before being finally revealed in the 2015 Tokyo Game Show. The game was released for the UsefulNotes/PlayStation4 on November 28, 2019 in Japan. A playable demo was released on March 14, containing the game's first three hours. It was released overseas on September 22, 2020 with EFIGS support and an English dub.

* CantTakeAnythingWithYou: PlayedWith, the protagonists lose their clothes when entering the cockpits of their Sentinels, but notably some characters keep some of their accessories. Iori, Yuki and Natsuno still have their hair decs, Shinonome still has [[BandageBabe bandages in her neck and head]] and Megumi, Tomi and Gouto all keep their glasses on. Even after TheReveal that [[spoiler:the characters are naked because they're [[PeopleJars actually in the pods they were born in]], which means the only way for them to see themselves until they exit those pods is via the viewscreens, which are generated within the simulation and thus mesh with their digital representations in the simulation; otherwise Tomi, Renya and Ryoko would each wonder why her eyesight works when she isn't wearing her glasses, Nenji's hair would feel noticeably different, since he can't style his hair in the pod, Miura was obviously not ''born'' with the massive forehead scar he got in the sim, and so on. They don't mention it in the text, though.]]

* Leitmotif: A remixed version of "Brat Overflow" without lyrics plays during the final battle before fading into the version from the Title Screen. Also, remixed parts of the song can be heard throughout the scenes following the final battle during the credits.

* AlbumClosure: The song played during the title screen can be heard during the final battle and the endings scenes before the credits.

* AlbumClosure: The song played during the title screen can be heard during the final battle the endings scenes before the credits.

** [[spoiler:TheReveal at the very end of the game that the 13 protagonists plus Tamao and Okino are the only remaining actual humans and were incubated in pods until ready for emergence is reminiscent of ''Film/TheMatrix''.]]

* GuideDangIt: In Juro Kurabe's story, after the "A Relentless Nightmare" segment, players might get stuck on how to advance to the next segment, since there's apparently no story lock, but the percentage is stuck at around 55%. [[spoiler:It requires filling a section of the plot flowchart that isn't an official segment, namely the "Daily Life" section. First, Juro should get rid of Kyuta in the classroom by saying he has to deliver papers for Morimura. Then Juro should enter the hallway and then visit the nurse's office by exiting the hallway to the right. Then, Juro should check the documents on the nurse's desk, and also speak to Ryoko Shinonome. After progressing the scene enough, Kyuta will come into the nurse's office, and once he and Juro go home, "Daily Life" will complete, and you'll get a story lock that needs 9 characters with at least 30%-character progression each. Unlock this lock, and you can play the next segment, "48Q".]]

* LoadsAndLoadsOfCharacters: The game has '''13''' playable protagonists. And this isn't even getting into the sheer number of supporting characters as well as the [[spoiler:past/future/clone/AI versions of the protagonists. Thankfully, after finishing the game the Event Archive is updated to include more characters to make it easier to follow their stories.]]

** Iori Fuyusaka's gratuitous {{Panty Shot}}s whenever she trips.