"Darling, it's betterAquatic videogame levels have been a staple of Nintendo games since Super Mario Bros., but can be seen in other games as well. Typical underwater enemies are sharks, octopuses, squid, urchins, electric eels, jellyfish (and sometimes Electric Jellyfish), clams, and some common fish like basses, rays, and mackerels with basic swimming patterns to serve as underwater goombas if the former options are a little too threatening. Expect some Underwater Ruins 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 Water Is Air. Of course, there are three problems with the underwater level: one, swimming, two, slower movement, and three, drowning. (Or not.) Down the Drain levels are especially prone to special water-based hazards and hindrances, as detailed on that page. Compare Shark Tunnel. These can enter That One Level territory, depending on how difficult it is to swim or how small the Oxygen Meter is. Named for the Oscar-winning song from The Little Mermaid.
Down where it's wetter,
Take it from me!"
Down where it's wetter,
Take it from me!"
— Sebastian, The Little Mermaid
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- Water levels abound in almost every The Legend of Zelda game:
- The Legend of Zelda: Ocarina of Time's Water Temple was so bad that the 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 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 Nintendo 3DS remake has the Water Temple as the only dungeon with substantial changes beyond the obvious cosmetic changes, such as 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.
- The Legend of Zelda: Majora's Mask has the entire ocean province known as the Great Bay. Within the Great Bay is the Great Bay Temple, where the puzzles revolve around trying to get the water to keep flowing through to a central point of the dungeon.
- Oracle Of Ages has an actual seafloor as part of the overworld, with the Zora town leading to the Womb Level inside of Jabu-Jabu.
- This is actually averted for The Wind Waker and Phantom Hourglass, surprisingly considering where the games take place (respectively the Great Sea and the World of the Ocean King). 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. In the case of Spirit Tracks, the Ocean Realm does have a large section underwater (the Ocean Floor) where Link's train can navigate without any issues, but the dungeon accessed within (the Ocean Temple), while being underwater as well, is somehow devoid of water in its room (even as a cosmetic element).
- Primal has a full-blown underwater level. Jen is given the Undine form to work and fight underwater while swimming. In an inversion of Super Drowning Skills, 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 Ōkami 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.
- Blaster Master's Stage 5, in addition to having a That One Boss, 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. Zero has its Area 5 amount to the same thing, the big difference being that Jason gets to voice how much he is looking forward to this area, and that Gunvolt has his own problems.
- DeepDive from An Untitled Story. A vertical shaft of water. Your oxygen is limited, but there are several air sources and Oxygen Meter expansions to survive.
- The Metroid Vania Castlevania games often have a water level. Castlevania: Circle of the Moon's is mostly only shallow puddles of water, and Castlevania: Portrait of Ruin 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. Order of Ecclesia has two such levels.
- Alundra has the optional dungeon Fairy Pond which takes place mostly underwater and houses one of the best swords in the game in it.
- Half of the NES game Jaws is fighting sealife underwater. Other half has you sailing your boat between two ports purchasing power ups.
- Jables's Adventure has a few underwater areas, featuring fish enemies, a mermaid, and a SCUBA-diving bear.
- The Teenage Mutant Ninja Turtles game for NES had the dam stage where you had to disarm eight bombs underwater.
- A Valley Without Wind 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 Black Whales, the better.
- Shantae: Risky's Revenge has the underwater sections of Shantae's Lighthouse, Mermaid Cliff, and Seaside Retreat, which Shantae will need to scour with her Mermaid Form to find the three Golden Warp Squids and the entrance to the last dungeon. There's also the Sunken Cavern, an Unexpected Shmup Level where Mermaid Shantae must shoot down or avoid Tinkerbats with Scuba gear, killer fishes, and underwater mines.
- Jungle Hunt has one level where the hero attacks crocodiles while swimming.
- The submarine levels in various Metal Slug 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 quite difficult until you manage to work your way around the many projectiles. Click to see the level.
- In Spider-Man and the X-Men in Arcade's Revenge, 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 Nintendo Hard in the game.
- Tomb Raider
- Tomb Raider II has large part of the game set in a sunken ship, and Chronicles has a section of the game set in a submarine, and the sea around it.
- Tomb Raider: Underworld 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 Shatterhand.
- Captain America and the Avengers has Scene 3: "Challenge from the Bottom of the Sea," which is only part underwater.
- The boos fight with Porcupffer in Mario Pinball Land takes place underwater.
- The final fight in Virtua Fighter 2 was underwater, slowing your movement.
First Person Shooter
- The "Pelagic II" and "Deep Sea" missions in Perfect Dark.
- The climax of 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 MapleStory.
- Kingdom of Loathing 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 World of Warcraft.
- In Banjo-Tooie, Jolly Roger's Lagoon starts out as a Gangplank Galleon level, but then they remove your Oxygen Meter...
- Most worlds in Donkey Kong Country trilogy and Donkey Kong 64, include one aquatic level. In these levels, the Kongs can ride or must transform into Enguarde the swordfish to repel enemies. Donkey Kong Jungle Beat was the first game Donkey can fight off enemies underwater without any animal buddies. Donkey Kong Country Returns surprisingly lacks any water levels but Donkey Kong Country: Tropical Freeze had a whole world of nothing but water levels. Given the Kong's species, none of them should be able to swim in the first place.
- This setting is a staple of the Super Mario Bros. series:
- Super Mario Bros, is the first to feature a swimming Mario. Notably, the Minus World is also an underwater level, and it cannot be completed.
- Super Mario Land 2: 6 Golden Coins has two such areas: the Hippo Zone, which can lead to the Space Zone, and the Turtle Zone.
- Super Mario Bros. 3 has a frog suit that allows Mario or Luigi to swim faster. Makes World 3, a water-based level, much easier.
- In Super Mario World, Mario or Luigi can go underwater, also while riding Yoshi.
- Super Mario 64 is the first to include an Oxygen Meter, and water with magical healing properties, since your health meter and air meter are the same.
- The occasional water level is found in New Super Mario Bros. 1, New Super Mario Bros. Wii, New Super Mario Bros. 2, New Super Mario Bros. U, & New Super Luigi U.
- Super Mario Sunshine 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.
- Super Mario Galaxy has a whole seven worlds/areas with aspects of this setting, with the usual water based enemies that go with it.
- Super Mario 3D Land and its sequel Super Mario 3D World have the occasional underwater stage, with Land being the first 3D Mario game to not have an oxygen meter.
- In Mario & Luigi: Superstar Saga, the brothers can walk on the ocean floor and use their hand powers (fire and electricity) underwater.
- Most Mega Man games have one of these; while the blue bomber didn't swim except in Mega Man 8 (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, not that it was of any help. Mega Man Star Force 2 has Mess Cove.
- Undertow in Ristar.
- Sonic the Hedgehog:
- While many games contain water, Sonic 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 Hydrocity and later games, he can skip the whole swimming thing and just run across the water.
- As opposed to Sonic's Super Drowning Skills, Tails, Knuckles and Rouge can swim, and Knux can even get an artificial breather in Sonic Adventure 2 to dive as long as he wants (and walk on the floor).
- In Sonic Advance 3, Knuckles can swim on top of the water and optionally dive, while Sonic with Cream as his partner has an eternal air bubble on his head when they go into water. The worst part of the water levels were nightmares thanks to the drowning music.
- Some actual examples include the Underwater Ruins levels such as Hydrocity, but Coral Cave in Sonic Rush Adventure mixes it up with Underground Level and Minecart Madness.
- Aquatic Relix Zone in Sonic Pocket Adventure.
- Aquarium Park Zone from Sonic Colors.
- Sonic Adventure has this mainly in Sonic's Lost World, but almost all the Big stages feature water. Makes sense, considering he's fishing.
- Dry Lagoon and Aquatic Mine from Sonic Adventure 2 combine this with Underwater Ruins and Ruins for Ruins' Sake. Cannon's Core at the end of the game has a massive underwater section that Knuckles must traverse. Hope you got the Air Necklace!
- The Labyrinth of the Sea from Sonic Labyrinth.
- Labyrinth Zone in the original Sonic the Hedgehog. One Game Mod of it, Sonic The Hedgehog Megamix, upgrades it to Misty Maze Zone. Scrap Brain Act 3 also applies, being that it's a more difficult recolour of Labyrinth Zone. It was originally intended to be a sewer system of some sort, but time constraints forced the team to make essentially "Labyrinth Zone Act 4", so it looks a bit out of place.
- Aquatic Ruin from Sonic the Hedgehog 2, of the Underwater Ruins variety. More infamously is Chemical Plant however, not for being a full water level, but for the last quarter to have a rising section of pink water that was a major Difficulty Spike to players back in the day.
- Hydrocity from Sonic the Hedgehog 3, also of the Underwater Ruins variety. Sonic 3 has a lot of water though, to the point that almost all the zones in the Sonic 3 half of the game feature it to some extent.
- Tidal Tempest in Sonic CD.
- Tidal Plant in Sonic Triple Trouble which borders on being Down the Drain as you spend almost the entire second act underwater.
- Aqua Lake in the Game Gear version of Sonic 2. Unlike later games, Sonic doesn't run on the water's surface, instead bouncing over it like a skimming stone.
- Aqua Planet in Sonic Chaos is different from the other examples in that despite it's name the level doesn't have very much water, it's pretty easy to avoid for the most part, and you're not too likely to drown. This is to the point that many of the series' stages that aren't dedicated water levels have more water.
- Lost Labyrinth from Sonic the Hedgehog 4 is this mixed with Underwater Ruins. There is also Sylvania Castle (same sort of thing) and White Park's third act (the rest is Slippy-Slidey Ice World and Amusement Park).
- Water Palace from Sonic Rush. Rush Adventure has Coral Cave that was mentioned above, but it also has Pirates Island, another Underwater Ruins level, only with more anchors, dolphins, and weaponry.
- Blue Marine in Sonic Blast.
- Wild Water Ways in SegaSonic the Hedgehog.
- The Sonic Advance Trilogy gets these as well. Ice Mountain in 1 and Twinkle Snow in 3 are both combined with Slippy-Slidey Ice World (Dimps likes this combination). Ocean Base in 3 is an Underwater Base, but features significantly less water. Advance 2 has two pools of water in the first act and that's it, making it a rare 2D Sonic game to not have a dedicated water level.
- Sonic Generations has some. The HD version features Chemical Plant, which is upgraded to become somewhat more watery than the original's, complete with water rising sections. It also has Seaside Hill, which wasn't a water level in the first place but was retooled to be Underwater Ruins for Classic Sonic. The 3DS version features the reappearance of Water Palace.
- Maridia in Super Metroid, and the sunken frigate in Metroid Prime.
- Sector 4 (AQA) in Metroid: Fusion, and the Torvus Undertemple in Metroid Prime 2: Echoes.
- Metroid: Other M doesn't have a dedicated water sector, but Sector 1 and Sector 3 have significant portions of underwater sections. These are infuriating because you have the Gravity Suit that allows you to move underwater unhindered, but it isn't authorised until extremely late into the game.
- Wario Land has had a few of these settings.
- The first has water levels in Sherbet Land and the SS Tea Cup areas, the second has the Ruins Under the Sea and the fourth game has Mystic Lake (not quite the sea, but it has the marine wildlife and features you'd see in an ocean).
- Wario Land Shake It has various underwater submarine shooter type levels (Wavy Waters and Creep Blue Sea being examples).
- Quaria in Bug!. Filled with many fish enemies, fire-spitting moray eels (yes, underwater), crabs, starfish and clams. Oh, and the obligatory giant octopus/squid, which served as the boss.
- Athena has the World of Sea, where Athena can use a necklace to transform herself into a mermaid.
- In Commander Keen 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 kills you at a touch.
- In Spyro the Dragon, Spyro had Super Drowning Skills, 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.
- Rayman Origins 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.
- Little Nemo: The Dream Master 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 Sly Spy, the protagonist dons a scuba suit to go underwater for the fourth and seventh stages, which feature Thunderball-style harpoon combat.
- 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.
- Disney Princess Enchanted Journey has Ariel's world.
- Barney's Hide & Seek Game on the Sega Genesis has the fourth level which Barney himself says is "Under the Sea".
- The world "In the Drink" in Monkey Shines.
- "Lots O'Fish" and "Lots O'Jellyfish" on page five of Yoshi's Story.
- Overload Ocean in Kirby: Planet Robobot which is also industrialized given the game's theme.
- Tiny Toon Adventures games:
- In the 1991 NES Licensed Game of the same name, the second act of the second stage takes place underwater. If enough power is stored up in the POW meter, a spin move can be performed to knock out enemies with an underwater tornado. The level is also much easier if you play as Plucky, due to his enhanced swimming abilities.
- Several levels in Buster's Hidden Treasure take place underwater. While Buster cannot drown, he has no way to attack the sea creature enemies in the water aside from summoning Little Beeper.
- The Itchy and Scratchy Game has "The Pusseidon Adventure", which serves as the fourth level of the game. Enemies include oysters that shoot pearls, electric eels, and miniature Scratchy robots donned in scuba gear. The boss of the stage is Scratchy in a submarine.
- The sixth level of The Flintstones: The Rescue Of Dino & Hoppy takes place underwater. The level is somewhat easier if Fred collects the "Dive" move from one of the bonus stages.
- Sog Ee's Realm in Snake Pass is set mostly underwater.
- In Theta vs Pi 7 there are several underwater levels, most of which are in the sea but one of which is in King Pi�s castle. The challenge is that fish aren't vulnerable to normal attacks so need to be lead to their death or outrun.
- Repton Around the World includes the Oceans scenario, considered to be the game's most difficult.
- Super Indie Karts has the Shutshimi track Seaweed Speedway, an underwater track where you see various sea creatures, including a jellyfish that can spin you out when you run into it.
- Snowboard Kids 2 has Turtle Islane (no relation to the trope of the same name), the second half of which takes place on the seafloor. Unlike most racing game examples, the snowboarders are fully submerged in water. They don't need to breathe air though.
- Ever since Mario Kart 7 introduced underwater racing as a mechanic, many courses are either completely this theme, such as Dolphin Shoals or Cheep Cheep Lagoon; become this theme as a returning course, such as Koopa Cape going from Shark Tunnel to this; or have this theme mixed with another theme, such as Wario Shipyard mixing Gangplank Galleon with it or Sherbet Land's Slippy-Slidey Ice World allowing you to travel into the frozen lake.
Role Playing Game
- Atlantica in Kingdom Hearts I, which is a world based on The Little Mermaid, the Trope Namer. Unfortunately, many players didn't like the level thanks to its unintuitive control scheme, so the developers "fixed" it for the sequel by replacing it with a (thankfully optional) rhythm game.
- Final Fantasy VI has the Serpent Trench, in which 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 Inexplicable Treasure Chests.
- There is no specific underwater level in Final Fantasy X 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 Marvel Ultimate Alliance The difficulty of operating underwater is technobabbled 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 Knights of the Old Republic 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 That One Level.
- Wizardry 8 has the Bayjin Shallows and Mount Gigas Water Caves. Despite preventing fire magic from working, the water areas are not the resident Scrappy Level. That title is reserved for Bayjin, the Palmtree Panic level you're trekking underwater to get to.
- In Pokémon Ruby and Sapphire, 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. Underwater areas also have patches of seaweed home to a small variety of aquatic Pokemon only found there. Dive was absent in Gen IV, but returned in Pokémon Black and White, though it doesn't see nearly as much use. In Ruby & Sapphire's remakes, more is added to the diving areas including a new class of trainers, the Divers, and a greater variety of wild Pokemon.
- One thing worth noting is that while these are the only games that actually let you go underwater, aquatic environments are a part of every game. Instead of diving, you ride your Pokémon across it.
- Bottomsup Bay in Fossil Fighters. The player walks fully-clothed along the bottom of the ocean, looking for fossils. There are also sharks when the area is first unlocked.
- 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 kissing robotic mermen who breathe the air into them.
- Appears in some games in the Might and Magic 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 Elemental Plane of Water in VIII. Much closer to ordinary areas, as 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.
- Dokapon Kingdom has the Sunken Shrine, where you find the Ancient Technology to turn yourself into a Robo Knight.
- In 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.
- In Mario & Luigi: Superstar Saga the floor of Oho Ocean is one of the ares explored in the game.
- Blubble Lake has underwater areas in Mario & Luigi: Bowser's Inside Story.
- The Tile Pool in Super Paper Mario.
- Child of Light has the Palace of the Sun under the Cynbel Sea.
Shoot 'em Up
- In Dead Moon for the TurboGrafx-16, the fifth stage takes place inside a mysterious lake. It ends with a Boss Battle against a Darius-like giant fish.
- DownWell has this for the Aquifer area.
- Star Fox 64 has Aquas, which switches out the space fighter for a submarine. The original Star Fox doesn't have an underwater level per se, but Sector Y takes Space Is an Ocean to ridiculous levels.
- 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 Final Boss under those conditions in the ninth and last level, albeit your ship doesn't suffer from any ill effects whatsoever underwater.
- One mission in MechWarrior 2: Ghost Bear's Legacy involved attacking an enemy base underwater. You cannot customize your mech, and the 95-ton Executioner handles underwater about as well as you think it would. The visibility is very poor, making you nearly blind at anything beyond knife-fight range (but 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 That One Level.
- One field in Backyard Baseball is the Aquadome, which is completely underwater. Yet the characters can still breathe...
- One of the mini-games in Tiny Toon Adventures: Wild and Wacky Sports involves Buster and his friends diving for treasures under the sea, whilst avoiding the Hammerhead Shark. Buster and his friends have oxygen meters to mind to avoid drowning, which means occasionally having to rise to the surface or breathe in air bubbles.
Turn Based Strategy
- Piratez: Some missions take place underwater, where you can swim in 3D and find some treasure! (Also die horribly from a Deep One's ballista, because you can't see underwater anywhere as well as actual underwater races.)
Entire games/works that take place Under the Sea:
- Frank Herbert's The Dragon In The Sea (aka Under Pressure).
- Frederik Pohl and Jack Williamson's Undersea Trilogy.
- Jules Verne's 20,000 Leagues Under the Sea (Older Than Radio.)
- The latter portions of J. R. R. Tolkien's Roverandom take place here.
- Raymond Z. Gallun's "Davey Jones' Ambassador" (1935) features an entire civilization of octopus-like sapients dwelling miles beneath the sea and using Organic Technology to compensate for their lack of fire and processes dependent upon high temperatures.
- Mermaid Adventures by Third Eye Games.
- The Hunt for Red October games for the NES and SNES, where you play as the Red October.
- Aquaria is a Metroidvania indie-darling game that takes place entirely in an undersea world.
- BioShock 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.
- BioShock 2 adds underwater sections, but you can't use any weapons, you have infinite air, and no enemies appear while outside of the Underwater City.
- SOMA uses a similar element to Bioshock 2, but more time is spent underwater than inside the various sites of Pathos-II, and there's the occasional hostile robot that you need to avoid. You still have infinite air, though. At one point, you even have to search a sunken ship while avoiding a teleporting monster.
- The Ecco the Dolphin series is spent underwater. And it's completely justified, because you are playing as a dolphin. Strangely enough, it works, despite the occasional Scrappy Level and Those Several Bosses.
- Endless Ocean
- Any Spongebob Squarepants game, obviously. However, it gets weird in the Nicktoons Unite series where they have to explain how humans can breathe underwater. The first game technobabbles away with Jimmy Neutron's air gums and Attack of the Toybots skirts the issue by having Bikini Bottom as a tutorial level played only as SpongeBob (though Dummied Out 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.
- Dive II Hunt, a game which involves a known character from the Ivalice Alliance, Sorbet, scuba diving under the sea and obviously, to be the best hunter.
- The Legendary Starfy
- The submarine shooting game In the Hunt. Well, except the final level, which was an enemy base.
- The Little Mermaid (the Licensed Game) 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 Jaws Unleashed, excluding the trip to sea park and the tunnels of Environplus' undersea facility.
- XCOM Terror From The Deep is set mostly on the ocean floor. It is the Seaquest to X-COM's Star Trek.
- Swim, Ikachan! takes place in a sea cave cut off from undersea civilization by earthquakes and run by the tyrannical Ironhead.
- Bubble Dizzy, in which Dizzy has to float towards the surface by jumping on rising bubbles that pop after a few seconds.
- The Aquanox series and their predecessor Archimedean Dynasty take place after a nuclear conflict caused the Earth to become heavily irradiated and forced its inhabitants to thrive under the oceans.
- Rescue from Atlantis
- Most of Fox Eye's games take place in underwater levels and of course has an Oxygen Meter that either serves as the player character's health bar, connect itself to the health bar, or be completely separate from it. Given the nature of these games, it's to appeal to the creator's desires of underwater fantasies. One of their games, Sacrifice Girl, for example, takes place entirely underwater and is a combination of Survival Horror / Metroidvania that requires a lot of strategic traversing to avoid the many traps as well as the Super-Persistent Predator that gives chase to the player character.
- Super Solvers titles Treasure Cove and Operation Neptune take place underwater. Treasure Cove is mostly the player character scuba-diving in shallow waters around an island, while Operation Neptune takes a submarine to the bottom of a trench.
- Subnautica is almost completely underwater, except for two islands and the wreck of the Aurora.
- Van Beuren Studios:
- Most of the Tom & Jerry cartoon "The Rocketeers" is set underwater, after Tom and Jerry's attempt to fly off on a rocket goes haywire.
- "The Haunted Ship", starring Waffles the Cat and Don the Dog, is also set almost entirely underwater.
- ReBoot has a game that was entirely underwater. It was used to introduce Andraia.
- Jabberjaw took place in an era where mankind had developed civilizations underwater.
- Sea Princesses takes place in the underwater world of Salacia, home of numerous kingdoms named after sea creatures.