History VideoGame / Submerged

* BotanicalAbomination: [[spoiler: The Big Man, the usurper who'd convinced the second city's residents to exploit the Seeds for electricity, was seized by the Mass and remade as a ''gigantic'', frightening humanoid of twisted Black Plant tendrils. Partway through the main quest, it rises from the depths to wade its way around the city, stopping to watch Miku's progress ominously with each subsequent Seed she retrieves.]]

* BotanicalAbomination: [[spoiler: The Big Man, a usurping leader who convinced the second city's residents to exploit the Mass's precious Seeds for electricity, arose as a ''gigantic'', frightening humanoid of twisted Black Plant tendrils. Partway through the main quest, it rises from the depths to wade its way around the city, stopping to watch Miku's progress ominously with each subsequent Seed she retrieves.]]

* [[TakenForGranite Taken For Greenery]]: Miku and Taku discover stationary human-like figures shaped from plant matter scattered all over ''Hidden Depths'''s city. Miku surmises these are its former inhabitants, transformed by the Mass. [[spoiler: At the climax, the fearsome Big Man monster changes into a gigantic and unmoving tree.]]

* [[TakenForGranite Taken For Greenery]]: Miku and Taku discover stationary human-like figures shaped from plant matter scattered all over ''Hidden Depths'''s city. Miku surmises these are its former inhabitants, transformed by the Mass.

* BambooTechnology: The former colonizers of the ruins from ''Hidden Depth'' left behind some fairly complex mechanisms - elevators, drawbridges, cargo slings - cobbled from wood and rope.

** It's easier to tell the siblings are speaking a pidgin form of English in ''Hidden Depths''.

* {{Plantimals}}: All of the collectible creatures in ''Hidden Depths'' are animal-shaped vegetative constructs generated by the Mass.

* ThreateningShark: Subverted; while a huge shark's fin and tail do cruise by Miku's boat at times in the first game, it's a harmless whale shark cruising for plankton. The second game's "shark" is likewise harmless, [[spoiler: and is even one of the more beautiful Plantimals in the game]].

* {{Planimals}}: All of the collectible creatures in ''Hidden Depths'' are animal-shaped vegetative constructs generated by the Mass.

* TheCorruption: As Miku progresses, she developes a worrying cough, and her skin begins turning green-and-grey like ''Sunken City'''s inhabitants. In fact, it almost seems as though she is being overgrown with algae (and if you look closely, the same can be seen happening to her boat). This same condition also afflicts much of the marine wildlife.

* FloodedFutureWorld: The game takes place after GlobalWarming flooded the world, and is set in the remnants of a metropolis whose tallest buildings are now like an archipelago of small islands.

* FutureImperfect: Miku has no idea what many of the city's decrepit landmarks originally were, so the brief animations as she sights each one give them names appropriate to what she ''does'' know (e.g. the protruding upper portions of a suspension bridge are called "the Silver Pass").

* HowWeGotHere: As you find supplies, the game reveals the sad story of how Miku and Taku came to be in the city.
* ImprovisedZipline: A few of the major buildings Miku climbs have cables running between sections of rooftop, which she can zip down.
* LanguageDrift: Miku is ''almost'' a HeroicMime, but the few voice lines she does say (mostly after delivering supplies back to the home point) indicate this trope is in effect; if you listen closely, you can pick out a few words clearly derived from English.

* ScavengerWorld: The main part of the gameplay is to collect emergency supplies from the top of buildings that were probably dropped there when the city went underwater.

* SunkenCity: A moderately substantial one traversed by boat, with once-modern buildings in various states of collapse.
* SurprisinglyHappyEnding: Over the course of the game Miku gets increasingly infested with the algae while the city inhabitants watch. The impression is that she's either dying or turning into one of them. At the end [[spoiler: the inhabitants gather around her and somehow draw the algae out of her, and she and her much-recovered brother leave in their boat.]]

* ThreateningShark: Subverted; while a huge shark's fin and tail do cruise by Miku's boat at times, it's a harmless whale shark cruising for plankton.

* FesteringFungus: More like Festering ''Alga'', but its effects upon Miku and the city's wildlife are comparable.

* DoesNotLikeShoes: Miku is always barefoot. It doesn't tend to be a bother, despite the post-apocalyptic ruins.

* TheCorruption: As Miku progresses, she developes a worrying cough, and her skin begins turning green-and-grey like the city's inhabitants. In fact, it almost seems as though she is being overgrown with algae (and if you look closely, the same can be seen happening to her boat). This same condition also afflicts much of the marine wildlife.

* BarbieDollAnatomy / EyelessFace: The sunken city's current inhabitants... aren't very human-looking anymore.

* FloodedFutureWorld: The game takes place after ClimateChange flooded the world, and is set in the remnants of a metropolis whose tallest buildings are now like an archipelago of small islands.

* GreenAesop: ClimateChange's bad, kids.

* GreenAesop: GlobalWarming's bad, kids.

* ThreateningShark: Subverted; while a huge shark's fin and tail do cruise by Miku's boat at times, it's a harmless ''whale'' shark cruising for plankton.