[[quoteright:250:[[VideoGame/DonkeyKongCountry http://static.tvtropes.org/pmwiki/pub/images/underthesea.bmp]]]]
[[caption-width-right:250:How exactly is he ''riding'' that swordfish?]]

Aquatic levels have been a staple of Nintendo games since ''VideoGame/{{Super Mario Bros|1}}.'', but can be seen in other games as well. Typical underwater enemies are [[ThreateningShark sharks]], octopuses, electric eels, and jellyfish (and sometimes ElectricJellyfish). Expect some UnderwaterRuins every now and again for decoration.

Human heroes, such as Mario, often swim fully clothed, without being weighed down or otherwise impeded -- it's as if WaterIsAir.

Of course, there are three problems with the underwater level: one, swimming, two, slower movement, and three, [[OxygenMeter drowning]]. (Or [[SuperNotDrowningSkills not]].) DownTheDrain levels are especially prone to special water-based hazards and hindrances, as detailed on that page.

Compare SharkTunnel. These can enter ThatOneLevel territory, depending on how difficult it is to swim or how little the Oxygen meter is.

Named for the [[TheOscar Oscar]]-winning song from ''Disney/TheLittleMermaid''.
!!Single-Level Examples:

* Water levels abound in almost every ''Zelda'' game:
** This is actually averted for ''[[VideoGame/TheLegendOfZeldaTheWindWaker The Wind Waker]]'', surprisingly considering where the game takes place. There are no true underwater dungeons and the water is opaque and cannot be dove into or even swam in for more than a short period. The closest example of a water level in ''Wind Waker'' is the Tower of the Gods, which only features water rising and lowering at timed intervals on the first floor.
** ''VideoGame/TheLegendOfZeldaOcarinaOfTime's'' Water Temple was so bad that the ''[[UpdatedRerelease Master Quest]]'' rerelease (which upped the difficulty in all levels) is said to be ''easier'' than the original. Which means they replaced one of the rooms with one that had half a dozen Stalfos in it. Problems include slow mobility through the submerged hallways, and backtracking between water level switch areas numerous times, which involved many treks through said hallways. Time after time you had to go in circles, Hookshotting every which way to collect keys, adjust water levels, and avoid enemies with indestructible shells. Then the battle with Dark Link will take a large amount of HP out of you, though [[GuideDangIt it can be replaced by MP loss if you have Din's Fire, and both could be lowered by doing the trading sidequest for the Biggoron's Sword]] (or the Megaton Hammer, which most players will have by that point in the game). And then when you get the Longshot, you have to go down this river where there are several whirlpools that act like bottomless pits, forcing you to start over. And then you have to get the Big Key to fight Morpha, who is relatively easy, but has a chance to do 5 Hearts of damage by simply using his standard attack, if you're unlucky.
** The Nintendo3DS remake has the Water Temple as the only dungeon with substantial changes beyond the obvious cosmetic changes, such as [[ColourCodedForYourConvenience color-coding]] the paths that you need to follow to change the water level, and making the Iron Boots a button-based item, eliminating the menu-switching problem.
** ''[[VideoGame/TheLegendOfZeldaOracleGames Oracle Of Ages]]'' has an actual seafloor as part of the overworld, though it contains rather little of interest.
* ''VideoGame/{{Primal}}'' has a full-blown underwater level. Jen is given the Undine form to work and fight underwater while swimming. In an inversion of SuperDrowningSkills, Jen's water form loses health when out of water, and cannot take so much as a step on dry land. Scree, being made of stone, just sinks and walks.
* The Dragon Palace in ''VideoGame/{{Okami}}'' is completely underwater, but the controls are identical to playing above land - jumping, gravity, et al. That includes small ponds that you can drown in. Underwater. (You can also shake off this underwater water.)
* ''VideoGame/BlasterMaster'''s Stage 5, in addition to having a ThatOneBoss, is almost entirely underwater, so your Rover moves and jumps really slowly, and you don't get the swimming ability for it until after you beat the boss, so to reach certain parts you are forced to swim in just your space suit, making you a sitting duck for the otherwise weak {{Mooks}}.
* [=DeepDive=] from ''AnUntitledStory''. A [[ShapedLikeItself vertical shaft]] of water. Your oxygen is limited, but there are several air sources and OxygenMeter expansions to survive.
* The MetroidVania ''Franchise/{{Castlevania}}'' games often have a water level. ''VideoGame/CastlevaniaCircleOfTheMoon'''s is mostly only shallow puddles of water, and ''VideoGame/CastlevaniaPortraitOfRuin'' has just a single boss, but the rest feature full underwater levels where you're slower and you can jump infinitely in the water. Usually an upgrade is needed to get this far. [[VideoGame/CastlevaniaOrderOfEcclesia Order of Ecclesia]] has two such levels.
* ''VideoGame/{{Alundra}}'' has the optional dungeon Fairy Pond which takes place mostly underwater and houses [[InfinityMinusOneSword one of the best swords in the game]] in it.
* Half of the NES game ''VideoGame/{{Jaws}}'' is fighting sealife underwater. Other half has you sailing your boat between two ports purchasing power ups.
* ''Videogame/JablessAdventure'' has a few underwater areas, featuring fish enemies, a mermaid, and a SCUBA-diving bear.
* The ''VideoGame/TeenageMutantNinjaTurtles'' game for NES had the dam stage where you had to disarm eight bombs underwater.
* ''VideoGame/AValleyWithoutWind'' has both Coastal and Shallow Ocean type areas. Coasts are fairly normal areas with large water hazards, but the oceans are a different beast. It's dark, it's oppressive and reaching the surface takes a full minute. But that's okay, since the acid water will kill you so quickly drowning isn't even modeled, and that's not even starting on the mutated wildlife. Blue Whales make terrifying hostiles when they're about as big as you'd expect, and the less said about [[BossInMookClothing Black Whales]], the better.

* ''VideoGame/JungleHunt'' has one level where the hero attacks crocodiles while swimming.
* The submarine levels in various ''VideoGame/MetalSlug'' games. Stage 5 of ''Metal Slug 4'' takes place on a military cruiser, with pirates put in as the Middle-Eastern sword throwers from ''Metal Slug 2'' with recolored sprites. The stage itself can be [[NintendoHard quite difficult]] until you manage to work your way around the many projectiles. [[http://www.youtube.com/watch?v=XQcJenQCqy4 Click to see the level.]]
* In ''VideoGame/SpiderManAndTheXMenInArcadesRevenge'', Storm's levels take place underwater, presumably so the developers wouldn't have to deal with the fact that Storm can fly. These levels are actually the least NintendoHard in the game.
* ''Franchise/TombRaider''
** ''VideoGame/TombRaiderII'' has large part of the game set in a sunken ship, and ''[[VideoGame/LaraCroftTombRaiderChronicles Chronicles]]'' has a section of the game set in a submarine, and the sea around it.
** ''VideoGame/TombRaiderUnderworld'' fits this trope more than the past titles as some of the stages take places in the Mediterranean sea and later the Arctic sea with underwater temples and so it has more emphasis in underwater gameplay.
* The filtration plant in ''VideoGame/{{Shatterhand}}''.
* ''VideoGame/CaptainAmericaAndTheAvengers'' has Scene 3: "Challenge from the Bottom of the Sea," which is only part underwater.

* The final fight in ''VideoGame/VirtuaFighter 2'' was underwater, slowing your movement.

* The "Pelagic II" and "Deep Sea" missions in ''VideoGame/PerfectDark''.

* The climax of ''[[Website/GaiaOnline zOMG]]'''s first chapter take place almost entirely under the ocean. Luckily, you've just been granted the power to breathe underwater.
* There's also Aqua Road of ''VideoGame/MapleStory''.
* ''VideoGame/KingdomOfLoathing'' has underwater zones for leveling up post-ascension, but they're the least attractive option due to poor returns. Adventuring there costs 2 adventures rather than the standard 1, requires equipment that eliminates item drops and removes or reduces familiar bonuses, and the areas do not drop money.
* Vashj'ir in ''VideoGame/WorldOfWarcraft''.

* In ''[[VideoGame/BanjoKazooie Banjo-Tooie]]'', Jolly Roger's Lagoon starts out as a GangplankGalleon level, but then they remove your OxygenMeter...
* Most worlds in ''VideoGame/DonkeyKongCountry'', and ''VideoGame/DonkeyKong64'', include one aquatic level. In these levels, the Kongs can ride or must transform into Enguarde the swordfish to repel enemies. ''Videogame/DonkeyKongJungleBeat'' was the first game Donkey can fight off enemies underwater without any animal buddies. [[AcceptableBreaksFromReality Given the Kong's species, none of them should be able to swim in the first place.]]
* This setting is a staple of the ''Franchise/SuperMarioBros'' series:
** ''VideoGame/{{Super Mario Bros|1}}'', is the first to feature a [[SuperNotDrowningSkills swimming Mario]]. Notably, the MinusWorld is also an underwater level, and it cannot be completed.
** ''VideoGame/SuperMarioLand2SixGoldenCoins'' has two such areas: the Hippo Zone, which can lead to the Space Zone, and the Turtle Zone.
** ''VideoGame/SuperMarioBros3'' has a frog suit that allows Mario or Luigi to swim faster. Makes World 3, a water-based level, much easier.
** In ''VideoGame/SuperMarioWorld'', Mario or Luigi can go underwater, also while riding Yoshi.
** ''VideoGame/SuperMario64'' is the first to include an OxygenMeter, and [[GoodBadBugs water with magical healing properties]], since your health meter and air meter are the same.
** ''VideoGame/SuperMarioSunshine'' has elements of this in nearly every single level, but Noki Bay has Mario go underwater with a diving helmet in various underwater ruins type areas.
** ''VideoGame/SuperMarioGalaxy'' has a whole seven worlds/areas with aspects of this setting, with the usual water based enemies that go with it.
** In ''VideoGame/MarioAndLuigiSuperstarSaga'', the brothers can walk on the ocean floor and use their hand powers (fire and electricity) underwater.
* Most ''Franchise/MegaMan'' games have one of these; while the blue bomber didn't swim except in ''VideoGame/MegaMan8'' (almost-sentient robots must be quite heavy, he did have a Rush upgrade for it in some games though), being underwater made you jump higher, [[SpikesOfDoom not that it was of any help.]] ''VideoGame/MegaManStarForce 2'' has Mess Cove.
* Undertow in ''VideoGame/{{Ristar}}''.
* ''Franchise/SonicTheHedgehog''
** While many games contain water, Sonic [[SuperDrowningSkills can't swim]], and instead runs along the floor, breathing air from bubbles made by underwater plants. Though if he gets up enough speed in [[VideoGame/Sonic3AndKnuckles Hydrocity]], he can skip the whole swimming thing and just ''run across the water''.
** As opposed to Sonic's SuperDrowningSkills, Tails, Knuckles and Rouge can swim, and Knux can even get an artificial breather in ''VideoGame/SonicAdventure2'' to dive as long as he wants (and walk on the floor).
** In ''VideoGame/SonicAdvance 3'', Knuckles can swim on top of the water and optionally dive, while anyone with Cream as their partner has an eternal air bubble on their head when they go into water. The worst part of the water levels were [[NightmareFuel/SonicTheHedgehog nightmares]] thanks to [[CriticalAnnoyance the drowning music]].
** Some actual examples include the UnderwaterRuins levels such as Hydrocity, but Coral Cave in ''VideoGame/{{Sonic Rush|Series}} Adventure'' [[HailfirePeaks mixes it up]] with UndergroundLevel and MinecartMadness.
** Aquatic Relix Zone in ''VideoGame/SonicPocketAdventure''
** Aquarium Park Zone from ''VideoGame/SonicColors''
** Dry Lagoon and Aquatic Mine from ''VideoGame/SonicAdventure2'' combine this with ''UnderwaterRuins'' and ''RuinsForRuinsSake''
** The Labyrinth of the Sea from ''VideoGame/SonicLabyrinth''.
** Labyrinth Zone in the original ''VideoGame/{{Sonic the Hedgehog|1}}''. One GameMod of it, ''VideoGame/SonicTheHedgehogMegamix'', upgrades it to Misty Maze Zone.
** Aquatic Ruin from ''VideoGame/SonicTheHedgehog2'' and Hydrocity from ''VideoGame/SonicTheHedgehog3'', both of which are also UnderwaterRuins.
** Tidal Plant in ''SonicTripleTrouble'' which borders on being DownTheDrain as you spend almost the entire second act underwater.
** Aqua Lake in the GameGear version of Sonic2
** Aqua Planet in SonicChaos is different from the other examples in that despite it's name the level dosen't have very much water, it's pretty easy to avoid for the most part, so you're not too likely to drown.
** Lost Labyrinth from ''Sonic4'' is this mixed with ''UnderwaterRuins''
** Water Palace from ''VideoGame/SonicRush''
** Wild Water Ways in ''SegaSonicTheHedgehog''
* ''Franchise/{{Metroid}}'':
** Maridia in ''VideoGame/SuperMetroid'', and the sunken frigate in ''VideoGame/MetroidPrime''.
** Sector 4 (AQA) in ''Metroid Fusion'', and the Torvus Undertemple in ''Metroid Prime 2: Echoes.''
* ''VideoGame/WarioLand'' has had a few of these settings. The first had water levels in Sherbet Land and the SS Tea Cup areas, the second had the Ruins Under the Sea and the fourth game had Mystic Lake (not quite the sea, but it had the marine wildlife and features you'd see in an ocean).
** ''VideoGame/WarioLand Shake It'' has various underwater submarine shooter type levels (Wavy Waters and Creep Blue Sea being examples)
* Quaria in ''VideoGame/{{Bug}}!''. Filled with many fish enemies, [[ArtisticLicenseBiology fire-spitting moray eels]] ([[ArtisticLicensePhysics yes, underwater]]), [[GiantEnemyCrab crabs]], [[AsteroidsMonster starfish]] and clams. Oh, and the obligatory giant octopus/squid, which served as the boss.
* ''VideoGame/{{Athena}}'' has the World of Sea, where Athena can use a necklace to transform herself into a mermaid.
* In ''VideoGame/CommanderKeen Episode 4: Secret of the Oracle'', the Well of Wishes was the obligatory underwater level where you can't jump or shoot, and swimming controls are rather awkward. Its waters are home to numerous mines and the one and only Dopefish. Water in other places simply [[SuperDrowningSkills kills you at a touch]].
* In ''VideoGame/SpyroTheDragon'', Spyro had SuperDrowningSkills, so the first game didn't use water. However, subsequent games gave him the ability to swim and sent him to levels that were mainly water, which were usually ''very annoying''.
* ''VideoGame/RaymanOrigins'' had several underwater levels, but they averted the frustrating part with fantastic swimming controls, and you could actually be just as agile as you are on land.
* ''VideoGame/LittleNemoTheDreamMaster'' has the fourth level, Night Sea.
* ''Karnov'' has Stage 5, where Karnov can move faster underwater with the aid of a diving helmet. Karnov's fireballs, unlike Mario's, are not prevented by immersion.
* In ''VideoGame/SlySpy'', the protagonist dons a scuba suit to go underwater for the fourth and seventh stages, which feature ''Film/{{Thunderball}}''-style harpoon combat.
* ''VideoGame/{{Something}} series'':
** There is a section of swimming in the Lost Path's switch palace exit. It's difficult because of the Phantos.
** The level called Only Water Level in Something is the only pure water level in Something. It's unique because of the blue Angry Sun pursuing Mario at all times.
** Star Ocean in Something Else. It's filled with stars, Cheep-Cheeps, and Electric Jellyfish. Also, some of the stars are Rotodisc sprite-swaps and they want to kill Luigi.
* ''VideoGame/DisneyPrincessEnchantedJourney'' has Ariel's world.

* ''{{Repton}} Around the World'' includes the Oceans scenario, considered to be the game's most difficult.

* Atlantica in ''VideoGame/KingdomHeartsI'', which is a world based on ''Disney/TheLittleMermaid'', the {{Trope Namer|s}}. Unfortunately, many players [[ScrappyLevel didn't like the level]] thanks to its unintuitive control scheme, so the developers "fixed" it for [[VideoGame/KingdomHeartsII the sequel]] by replacing it with a (thankfully optional) [[UnexpectedGameplayChange rhythm game]].
* ''VideoGame/FinalFantasyVI'' has the Serpent Trench, in which [[FridgeLogic three party members all cram their heads into one diving helmet]] and ride an underwater current while fighting various aquatic enemies, occasionally stopping at half-submerged caves to raid InexplicableTreasureChests.
* There is no specific underwater level in ''VideoGame/FinalFantasyX'' but the game has three party members able to breathe underwater so various parts of Spira have underwater access such as Besaid Island, Mt Gagazet, Baaj Temple and the Submerged Ruins where your characters are able to fight underwater too.
* The Atlantis mission in ''VideoGame/MarvelUltimateAlliance'' The difficulty of operating underwater is {{technobabble}}d away by the presence of special nanites that allow the heroes to survive and fight even while underwater. Considering characters like Storm, Silver Surfer and Ghost Rider can already do fine underwater, they could have just let everyone else sit out.
* The final quest on Manaan in ''VideoGame/KnightsOfTheOldRepublic'' requires you to walk at the bottom of the ocean in a protective suit that slows you down to turtle-speed, while avoiding the dangerous wildlife. For many players, it counts as ThatOneLevel.
* ''VideoGame/{{Wizardry}} 8'' has the Bayjin Shallows and Mount Gigas Water Caves. Despite preventing fire magic from working, the water areas are ''not'' the resident ScrappyLevel. ''That'' title is reserved for Bayjin, the PalmtreePanic level you're trekking underwater to get to.
* In ''VideoGame/PokemonRubyAndSapphire'', the Dive HM makes it possible to go underwater in certain regions of Hoenn. In fact, this is the only way to reach certain areas, like the entrance to Sootopolis City. Then Dive returns in ''VideoGame/PokemonBlackAndWhite'', though it doesn't see nearly as much use.
* Bottomsup Bay in ''VideoGame/FossilFighters''. The player walks fully-clothed along the bottom of the ocean, looking for fossils. There are also sharks when the area is first unlocked.
* ''VideoGame/{{Mother 3}}'' has the Sea Floor Dungeon between Tazmily Village and Tanetane Island. Lucas and company can't run underwater, and can only replenish their oxygen meter by [[MakesJustAsMuchSenseInContext kissing robotic mermen who breathe the air into them]].
* Appears in some games in the ''VideoGame/MightAndMagic'' series
** The Shoals in ''VII'', entered late in the game. You can't cast magic, you have to wear wetsuits (which prohibits you from wearing or using ''any'' other kind of equipment, except for Blasters) and the mechanism for getting you there means you can't prepare yourself for it by casting buffs before you enter. On the plus side, there's no problem with swimming (it works like flying, except you sink - slowly - if you stop), and the sharks infesting the area are weak enough that by the time you reach the Shoals, the only reason they are something of a threat is the aforementioned limitations on magic and equipment.
** The [[ElementalPlane Elemental Plane of Water]] in ''VIII''. Much closer to ordinary areas, as [[SuperNotDrowningSkills no wetsuit (with accompanying restrictions) is needed this time]] (the game doesn't explain why, though it might be because it is an elemental plane rather than a mundane underwater area) but there's a greater variety in foes, some of which have ranged attacks. The swimming mechanics are the same, though.
* ''VideoGame/DokaponKingdom'' has the Sunken Shrine, where you find the Ancient Technology to turn yourself into a Robo Knight.
* In ''VideoGame/{{Robopon}}'', if you have any fishlike Robopon you can dive under the water to an interconnected undersea labyrinth. It also has one of the best tunes in the game.

* ''VideoGame/StarFox64'' has Aquas, which [[UnexpectedGameplayChange switches out the space fighter for a submarine]]. The original ''VideoGame/{{Star Fox|1}}'' doesn't have an underwater level per se, but Sector Y takes SpaceIsAnOcean to ridiculous levels.
** ''VideoGame/StarFoxCommand'' features the return of Aquas, plus has the BigBad's [[VeryDefinitelyFinalDungeon Very Definitely Final Base]] in the [[HollywoodAcid acidic oceans]] of [[NamesToRunAwayFromReallyFast Venom]], which the heroes can't enter without a MacGuffin.
* ''VideoGame/{{Stargunner}}'' has two levels in the first and fourth (the latter being the last) episodes that take place underwater, though you can shimmy up to the surface if you wanted to. The next seven levels after the second in the last episode, however, take place entirely under the sea; yes, you even face the FinalBoss under those conditions in the ninth and last level, albeit your ship doesn't suffer from any ill effects whatsoever underwater.

* One mission in ''[[VideoGame/{{Mechwarrior}} MechWarrior 2: Ghost Bear's Legacy]]'' involved attacking an enemy base underwater. You cannot customize your mech, and the 95-ton Executioner handles underwater [[InterfaceScrew about as well as you think it would]]. The visibility is very poor, making you nearly blind at anything beyond knife-fight range (but [[TheComputerIsACheatingBastard the AI can see you just fine]]). The only weapons you have are powerful but slow-moving [=PPCs=] and even slower-moving torpedoes, and you face hordes of enemy mechs. But the worst thing is that if you take a ''single'' hit to internal structure, even if it's not a critical hit, that entire section of your mech will be destroyed by flooding. So if your torso section loses its armor, it's game over. This is also ThatOneLevel.

* One field in ''[[VideoGame/BackyardSports Backyard Baseball]]'' is the Aquadome, which is completely underwater. Yet the characters can still breathe...

!!Entire games/works that take place UnderTheSea:

[[AC: Film]]
* ''Disney/TheLittleMermaidIII'' took place entirely underwater.
* ''WesternAnimation/FindingNemo'' was almost entirely set underwater, the characters being fish and all.
* ''WesternAnimation/BarbieThePearlPrincess'' takes place entirely underwater, as everyone is either a fish or a mermaid/merman.

* Creator/FrankHerbert's ''Literature/TheDragonInTheSea'' (aka ''Under Pressure'').
* Creator/FrederikPohl and Creator/JackWilliamson's ''Literature/UnderseaTrilogy''.
* Creator/JulesVerne's ''Literature/TwentyThousandLeaguesUnderTheSea'' (OlderThanRadio.)
* The latter portions of Creator/JRRTolkien's ''Literature/{{Roverandom}}'' take place here.
* [[Creator/RaymondZGallun Raymond Z. Gallun]]'s "Davey Jones' Ambassador" (1935) features an entire civilization of [[EverythingsSquishierWithCephalopods octopus-like]] sapients dwelling miles beneath the sea and using OrganicTechnology to compensate for their lack of fire and processes dependent upon high temperatures.

* The song "Where Is My Mind?" by Music/ThePixies from ''Music/SurferRosa'' was inspired by scuba diving.
* ''Music/InABarUnderTheSea'' by Music/{{dEUS}} refers to being under the sea in the album title, as well as the protagonist in "Disappointed In The Sun" who dives in the sea to go to an underwater bar.

* ''Pinball/{{Barracora}}'' is set around a mysterious underwater city populated by unusual humanoid mermaids and their barracuda.
* "The Abyss" table of ''VideoGame/PsychoPinball'' takes place entirely underwater.
* ''Pinball/{{Fathom}}'' takes place beneath a deadly Bermuda lagoon.

* ''TabletopGame/MermaidAdventures'' by Third Eye Games.

[[AC:Theme Parks]]
* Rides/DisneyThemeParks: The Subs ride, later ''WesternAnimation/FindingNemo'' attraction, and ''Disney/TheLittleMermaid'' dark ride.

* ''TheHuntForRedOctober'' games for the NES and SNES, where you play as the Red October.
* ''VideoGame/{{Aquaria}}'' is a {{Metroidvania}} indie-darling game that takes place entirely in an undersea world.
* ''VideoGame/{{BioShock|1}}'' takes place in a city at the bottom of the ocean. Amusingly, there's absolutely no swimming sections. The only time you actually travel in the ocean are the level-transitioning bathyspheres, which are automatic.
** [[VideoGame/BioShock2 The sequel]] adds underwater sections, but you can't use any weapons, you have infinite air, and no enemies appear while outside of the UnderwaterCity.
* The ''VideoGame/EccoTheDolphin'' series is spent underwater. And it's completely justified, because you are playing as a dolphin. Strangely enough, it works, despite the occasional ScrappyLevel and [[ThatOneBoss Those Several Bosses]]... Did I mention SpaceIsAnOcean?
* ''VideoGame/EndlessOcean''
* Any ''WesternAnimation/SpongebobSquarepants'' game, obviously. However, it gets weird in the ''VideoGame/NicktoonsUnite'' series where they have to explain how humans can breathe underwater. The first game technobabbles away with JimmyNeutron's air gums and ''Attack of the Toybots'' skirts the issue by having Bikini Bottom as a tutorial level played only as [=SpongeBob=] (though DummiedOut voice clips suggest that it would have been a regular level playable with anyone) but ''Globs of Doom'' is an offender in choosing to give no explanation.
* ''VideoGame/DiveIIHunt'', a game which involves a known character from the ''IvaliceAlliance'', Sorbet, scuba diving under the sea and obviously, to be the best hunter.
* ''VideoGame/TheLegendaryStarfy''
* The submarine shooting game ''VideoGame/InTheHunt''. Well, except the final level, which was an enemy base.
* ''VideoGame/TheLittleMermaid'' (the LicensedGame) sets all its levels underwater. Ariel doesn't turn back into a human and walk on dry land until the ending, which ironically is the only part of the game playing "Under the Sea" aside from the title screen.
* The whole of ''VideoGame/JawsUnleashed'', excluding the trip to sea park and the tunnels of Environplus' undersea facility.
* ''VideoGame/XCom: Terror from the Deep''
* ''SwimIkachan'' takes place in a sea cave cut off from undersea civilization by earthquakes and run by the tyrannical Ironhead.
* ''[[VideoGame/{{Dizzy}} Bubble Dizzy]]'', in which Dizzy has to float towards the surface by jumping on rising bubbles that pop after a few seconds.
* The ''VideoGame/{{Aquanox}}'' series and their predecessor ''ArchimedeanDynasty'' take place [[AfterTheEnd after a nuclear conflict caused the Earth to become heavily irradiated and forced its inhabitants to thrive under the oceans]].
* ''Rescue from Atlantis''

[[AC: WesternAnimation]]
* ''WesternAnimation/ReBoot'' has a game that was entirely underwater. It was used to introduce Andraia.
* ''WesternAnimation/{{Jabberjaw}}'' took place in an era where mankind had developed civilizations underwater.