[[quoteright:256:http://static.tvtropes.org/pmwiki/pub/images/Endless_Ocean_Coverart.png]]
[[caption-width-right:256:Dive in.]]

''Endless Ocean'' is a WideOpenSandbox AdventureGame mixed with a scuba diving sim by Arika, which simulates a series of scuba dives on an incredibly diverse coral reef. It became legendary for completely eschewing combat of any kind.

You, the player character, are a professional diver assigned as a "marine correspondent" to the fictional South Pacific island of Manoa Lai (Manaurai in the European release). This job generally involves looking at a lot of fish, and finding out information about them. The only character you actually get to interact with is your marine biologist assistant, Katherine. Along the way, you discover ancient ruins, caves, deep waters, and lots of MisplacedWildlife (though they at least made them all real fish).

There's a sequel entitled ''Endless Ocean 2: Adventures of the Deep'' (known as ''Blue World'' in the US), which allows players to choose from several dive spots around the world instead of being limited to a fictional South Pacific Ocean, including [[SlippySlideyIceWorld the arctic and antarctic]] and a [[BubblegloopSwamp section in the Amazon River]]. Dangerous animals can now actually attack the player, requiring the divers to make a quick escape or use equipment to pacify them before becoming [[strike:alligator]] caiman, piranha, or shark food.

Not to be confused with ''The Infinite Ocean'', a fairly creepy point-and-click adventure game about the first ArtificialIntelligence.
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!!This game provides examples of:
* AbsurdlyHighStakesGame: Jean-Eric won Nineball Island through the billiards game it's named for.
* AllInARow: How your diving partners follow you, although in the original game at least, you could make fish do this to you as well by just petting them a bunch of times after you've already learned all the facts about their species.
* AmazingFreakingGrace: One of the songs in the original.
* [[AnInteriorDesignerIsYou An Island Decorator Is You]]: ''Blue World'' lets you spruce up Nineball Island with various pieces of furniture, as well as stock a nearby reef with corals and kelp. You can even gain titles by getting all the pieces.
* AndYourRewardIsClothes: You frequently get new wetsuits, hairstyles, and scuba tanks as gifts from guided tour patrons or photography editors.
* {{Atlantis}}: Mo'ia Atoll. Maybe. Okeanides in ''Blue World''.
* AwesomeYetImpractical: In the first game, dolphin partners were cool and all, but had no real use - they tended not to follow you very well unless you blew the whistle every few yards (and took forever to come to you from across an area if you let them alone for a while before calling them), and riding them was neat, but couldn't be controlled, so you just go to watch yourself go in circles until you let go.
* TheBeastmaster: [[spoiler: The Okenaides and the Mo'ia Atol people could control cetaceans through songs, and formed the first world-wide civilization with their help.]]
* BadassCrew: While not in the traditional sense of the trope, in terms of diving expertise the second game's FiveManBand is perhaps the best in the world. Consisting of a retired adventurer with more years of experience then the rest of the crew put together, one of the world's leading marine biologists, a world renown salvage expert, and two life long pro-drivers one of which has abilities that are nearly super human.
* BigCreepyCrawlies: [[spoiler: The Grave Keeper is about twice the size of its already enormous friends.]]
* ButThouMust: In ''Blue World'', after you and Oceana find [[spoiler:the plesiosaur]], Oceane decides she's not going to publicize this discovery, and asks if you agree. You can say "I do" or "No I don't," but if you pick no, Oceana will just say "Really?" and ask you the question again. And again. And again.
* CaptainErsatz: Leviathan from the second game - an albino sperm whale with a reputation for attacking ships, with one fanatical captain hunting him down in order to get revenge. [[MobyDick Sound familiar?]]
* CartographySidequest
* TheCatfish: [[spoiler:Magu Tapah and the Ancient Mother]] in the first game; ''Blue World'' has '''many''', including an actual catfish that has [[AmazingTechnicolorWildlife turned golden in color]].
* CelebrityPower: Notable New Zealand vocalist Music/HayleyWestenra provided nearly the entire soundtrack for the game; her song "[[http://www.youtube.com/watch?v=dvuZ9j9gzlQ Prayer]]" was used for early demo display purposes, as well as being the [[RealSongThemeTune unofficial theme]] for the final product. The group CelticWoman provides some songs for ''Blue World''.
* ChuckCunninghamSyndrome: Ichiro Enoshima/Ken Kaimoto from ''Blue World'', who has an introduction that makes him seem fairly important before he disappears from the rest of the game. It seems that he was originally planned to have a much larger role, but Hayako apparently took most of it over.
* ContinuityNod: ''Blue World'''s notebook mentions, in the entry about the Pelago Commonwealth, that [[spoiler:a new species of whale]] was discovered in the Manoa Lai region two years ago; two years separated the releases of the first and second games. It's also mentioned in passing that Hayako helped [[spoiler:catch and release a giant whale.]]
** Also, Nancy sometimes mentions that she wishes she could send you her stuff via e-mail; this is the manner in which ''everything'' was received in the first game, despite the impossibility (such as a wetsuit being sent as an e-mail attachment).
* CoolBoat: The ''Gabbiano'', which the loading screens are quick to remind you is Italian for "seagull".
* CosmeticAward: "Titles" in ''Blue World''.
** Earning enough titles earns you the Poseidon diving gear. Includes a mini whale shark as an air tank for extra awesomeness!
* DerelictGraveyard: The Ship's Rest area in the first game and most of Ciceros Strait in the second.
* DisneyDeath: Oceana's father was mentioned to be dead from attempting to explore the Zahaab Region Depths for the Okeanos Temple. However, a certain sidequest heavily implies that he actually survived, but was amnesiac for a good part of the game.
* EnemyScan: Using your ''hand'' to fill the Marine Encyclopedia.
* EpicRocking (with shades of OminousMusicBoxTune): The Song of Dragons is an in-universe example: humanity obsesses over its meaning and origin, and it's become known as a harbinger of doom wherever it is heard. [[spoiler:It's actually a musical key known by all whales that guides people to and unlocks the Okeanides ruins... and subsequently drives the whales within mad to seal it up again.]]
* EverythingsBetterWithPenguins
* [[ThreateningShark Everything's Even Worse With Sharks]]: [[spoiler:Magu Tapah and Thanatos]] say hi. With their huge, tooth-lined, bloodied mouths.
* EverythingsSquishierWithCephalopods: GiantSquid enjoy the abyssal trench areas in both games, and there's the stock smaller variety and octopi, too.
* FakeLongevity: In the first game, you had to find each creature on three separate days in order to learn all three sets of facts about them to complete the Marine Encyclopedia. ''Blue World'' shortens this down to everything being learn-able in a single encounter, but also introduces money that has to be earned through work to spend on new gear. [[spoiler:Not to mention saving up ''a million'' pelagos in order to open Okeanides back up to casual exploration.]]
* FanService: Um... kind of? If you purchase swimwear in ''Blue World'' that doesn't consist of a wetsuit and have your character wear it, you can have him/her partake in a ShowerScene using the facilities behind the Nineball Island cabin.
** Or, if you don't need your character to be washing to appreciate it, you can take your character on a dive in the swimwear. Then you can go ashore, and look all around. Or hey, if the front is all you need, looking at the character wearing it in the equipment menu is sufficient.
* FastForwardMechanic: A location is provided to allow the player to move rapidly to another time of day and forwards in time with regards to things like missions.
* FiveManBand: In the second game.
** TheHero: You
** TheLancer: Oceana
** [[TheSmartGuy The Smart Chick]]: Hayako
** TheBigGuy: GG
** [[TheChick The Dude]]: Jean-Eric. Also TheMentor though remains a NonActionGuy due to an illness that keeps him from diving.
* {{Foreshadowing}}: The [[spoiler:Ancient Mother]] is foreshadowed by such things as the skeleton at the bottom of the Abyss, and Kat's comments when you assemble the Whale God Mirror. Mo'ia Atoll is also mentioned in passing during the Great Aqua Cave's backstory.
* ForScience: It is implied in the [[spoiler:''Anomalocaris'']] article/trivia that the one that GG and the player character encountered at Valka Castle was revived in a genetic experiment, and somehow was released into the wild.
* {{Friendly Playful Dolphin}}s: The games naturally feature dolphins and larger cetaceans from various locations. You can befriend certain dolphins. When players get to nineball island in ''Endless Ocean Blue World'' they can teach tricks to a dolphin.
* [[GaiasVengeance Gaia's Vengeance]]: Thanatos' trivia wonders if his emergence is Mother Nature's revenge for humanity's DisproportionateRetribution against shark attacks.
* GenkiGirl: Oceana at times.
* GhostShip: The large brown vessel which transports you to and from Ship's Rest, which you enter via ''the big gaping hole in its hull below the water line.'' In Ship's Rest itself, you can see the wreckage of the exact same boat right in the sand below where it's floating. It's actually really eerie, especially at night.
* GiantSwimmer: You can ride whales and dolphins through the ocean, though you can't control where they go. In ''Blue World'', your dolphin partner ''can'' give you a player-controlled lift, which is necessary in the freezing regions until your equipment improves.
* TheGoomba: Bicolor parrotfish are a nonviolent version of this. They appear practically everywhere.
* GreenAesop: Rears its head more often in the sequel than the original, but present either way.
* HeroicAlbino: [[spoiler:The Ancient Mother in both games and the Singing Dragons in ''Blue World''.]]
** ''Blue World'' is ''obsessed'' with albinos. A good chunk of the legendary creatures are albino, as is the bottlenose dolphin partner.
*** Leviathan (see CaptainErsatz above) is a possible case of EvilAlbino.
* HeroicMime: The player character.
* HotScientist: Kat and Hayako.
* HouseboatHero: The first game.
* HowWeGotHere: ''Blue World'' opens on the player character interacting with several "strangers" and being guided towards a massive underwater ruin... and then the backstory kicks in for the rest of the game.
* InUniverseCamera: When in third-person mode, any kelp, small fish, etc. pushed aside by the camera are actually due to Kat's "unmanned, remote-controlled minisub" following you.
* InUniverseGameClock: Different creatures can appear depending on if you dive in the daytime or at night. Furthermore, the first game actually cycles through a whole year which further alters what you can find as animals enter and leave Manoa Lai depending on the seasons.
* LastLousyPoint: The Yatabai Blenny is legendarily hard to find.
* LuckBasedMission: Anything involving a zoom-in point which doesn't [[NoticeThis shine beforehand]] in the first game. This includes a number of the smaller creatures and roughly half of the salvage items.
* MadeOfIron / UnstoppableRage: Thanatos is completely immune to the pulsar gun. Needless to say, exploring his section of Ciceros Strait is a royal pain.
* MagicRealism: The incredibly varied wildlife, all of the sea's animals being tame and friendly to humans, and the Manoa Lai artifacts and legends all seem to be best explained by something other than science.
** The sequel fixes the MisplacedWildlife aspect and the main plot is more AlternateHistory than magic, but the side quests include chasing a magic blue bird that can appear anywhere in the world, fetching items for a tiki idol, and "The Voice of the Night Sky" rewarding you for finding constellation coins scattered all over the world.
* {{Meganekko}}: Kat and Hayako again.
* MisplacedWildlife: ''Lots''. Averted in ''Blue World'', which has varied, round-the-globe environments to host all those fish.
** ''Blue World'' also makes sure that, in the event that an animal ''does'' show up where it shouldn't, the characters specifically point it out and puzzle over how it might have gotten there. One sidequest actually has you rescuing some saltwater fish who've wandered into a freshwater area and have become very sick as a result.
*** The first time you go there you even find a ''Minke Whale'' trapped upstream.
** Also subverted; all your dolphin pals except for the tropical ones get misplaced once they follow you home to sunny Nineball Island. Particularly the river dolphin. [[spoiler: The river dolphin that you get by taking along a dolphin from the ''Arctic.'']]
* MonsterCompendium: The Marine Encyclopedia is a variation on this.
* MouthFlaps: Despite there not being any actual voice work in the game. Even your character MouthFlaps without even having textual dialogue.
* NatureSpirit: It's hinted that some of the legendary animals are more then just animals. Thanatos [[spoiler: and the Ancient Mother]] are the prime examples of this [[spoiler:but the Blue Bird also seems to be more then it appears.]]
* NotGoodWithPeople: Kat, first variety.
* OminousLatinChanting: "Benedictus", an unlockable song found in the Abyss area.
* OpeningTheSandbox: ''Blue World'' has a few locations which have limitations imposed on you. Once you do what the plot requires you to do there, you are provided gear which allows you to explore them at your leisure.
* OverlyLongGag: Recruiting the last dolphin partner in the sequel. "Present your ''X'' to the lady!"
* PolarBearsAndPenguins: Played straight in the first game as part of the MisplacedWildlife; averted to hell and back in ''Blue World''.
* PopStarComposer: Music/HayleyWestenra of CelticWoman provides the soundtrack to this game and its sequel.
* RandomEncounters: A non-enemy example in the first game, in the form of "zoom-in" spots to look for the smaller creatures like sea slugs; their positions would shuffle around between dives. ''Blue World'' turned these spots into static PreExistingEncounters.
* RealSongThemeTune: "Prayer" by Music/HayleyWestenra.
* RecurringBoss: Darn you, Thanatos!
* RibcageRidge: There's a whale skeleton at the bottom of the Abyss. Also counts as {{foreshadowing}}, since it appears to be the same species as [[spoiler:the Ancient Mother]].
* RightBehindMe
--> '''Hayako:''' "What is with Finley always turning up when we're talking about him? Is he watching us?"
* RoaringRapids: There are a few of these where the character has to hold onto their dolphin partner to swim against them. In other cases, you get blown back with a "The current is too strong" message.
* [[FishingForSole Salvaging For Sole]]: There's an awful lot of trash hidden in unexpected parts of the ocean, such as empty juice bottles found near sealed containers of valuable ingots. But then, of course, this can definitely be TruthInTelevision depending on how often a given location gets human traffic.
* SceneryGorn: Most of Ship's Rest.
* SceneryPorn: Most of the earlier areas, and some of the later ones (see: the White Room in Great Aqua Cave.)
* ScienceIsBad: Averted. The mysterious and perhaps Godlike [[spoiler:Ancient Mother]] is captured and taken to the Manoa Lai aquarium without anyone raising a ruckus. You can release it later, though.
** Good luck finding each species (over 240) three times to fill in all of the encyclopedia to unlock this option, though! Serious GuideDangIt moments there.
* ScrewTheMoneyIHaveRules: Kat deciding to keep the piece of deep-sea coral found in the Abyss instead of selling it.
** Also Oceana insisting you keep [[spoiler:the plesiosaur]] a secret.
* SealedEvilInACan: The [[spoiler:Magu Tapah]], which you [[spoiler:have effectively released by befriending the orca that was guarding said can, and bringing it away from Ship's Rest.]] [[InferredHolocaust Oops.]]
* SeaMonster: The Ancient Mother. She returns along with a whole slew of Legendary Beasts [[spoiler: including an actual plesiosaurus]] in Blue World.
* SeriesMascot: The bottlenose dolphin. There are also people who claim that the emperor angelfish or bicolor parrotfish are the game's mascots, due to their both being extremely common.
* ShownTheirWork: Some of the game's detractors say it has a little too much information about fish sandwiched in. Fans say that's just part of its appeal. ''Blue World'' tones down the factoids considerably, but there's still a great deal to learn.
** There are a couple of mistakes, though. They're few and far between, but they're there: for example, the false killer whale you befriend in Blue World can apparently find items with its "keen sense of smell". Cetaceans have a highly-developed sense of taste, but they have no sense of smell in the conventional sense, as their nostrils are closed off most of the time.
* SlippySlideyIceWorld: The arctic and antarctic levels in the sequel.
* SmallTaxonomyPools: Averted, in as much as time, budget, and disc-space would allow.
* SoundtrackDissonance: Each theme was specifically crafted for one area, and can sound rather silly if you choose to play it somewhere else - for example, filling the cheery little Coral Forest with OminousLatinChanting.
* SpellMyNameWithAnS: The North American releases tend to change up character and location names. "Manaurai" became "Manoa Lai", and C's frequently become K's (Oceanides/Okeanides, Catherine/Katherine).
* SpiritualSuccessor: To the ''Everblue'' games.
* TheStinger: Inverted - instead of extra content during the credits, you can find the credits as an EasterEgg.
* StockSoundEffects: For the dolphins and whales. There's a pool of sounds each for small dolphins, big dolphins, whales, and belugas.
* TheStoic: The player character's defining trait, thus explaining his/her HeroicMime tendencies.
* SuperNotDrowningSkills: There actually ''is'' an air meter, but it expires too slowly to really matter.
** In the sequel, however, the air gauge is more realistically timed, but can still be lengthened by improving Diving Skill and buying regulators and support tanks (the tanks that say "support" in the name, preceded by a capacity; all the others are just cosmetic and only otherwise good for getting the title for having all the tanks).
* SuperPersistentPredator: Averted in the second game; sharks, caimans, and piranha will attack you, but will not chase you for too long before they give up.
** [[spoiler:Thanatos]] plays it straight, but it's implied that he might be more than what he appears.
* SurpriseCreepy: Don't let the lack of combat and mostly serene atmosphere fool you, these games have some awfully scary parts.
* TailorMadePrison: Ship's Rest turns out to be this for [[spoiler:the Magu Tapah]].
* TakeYourTime: An overriding theme of the series as part of its laid-back, tranquil atmosphere.
* TalkingAnimal: ''Blue World'' has two possible examples, both during side-quests.
** The first is the blue bird, though whether this is an illusion, telepathy, real speech or something else is never explained.
** The second would be during the dolphin-gaining sidequest. The Commerson's dolphin seems to be able to speak. Furthermore, any companions back on the boat can hear him/her over the radio. Once the dolphin becomes your partner, this detail is never mentioned again.
* TempleOfDoom: Mo'ia Atoll, an actual temple, though the worst booby-trap there is a jet of water which impedes your progress. Okeanides has similar water-directive traps, but also houses several dangerous fish that can deplete your oxygen quickly.
** Also, Valka Castle, with lionfish and a trick door that locks you in; the Spirit Falls ruins, with caimans, switch-pulling puzzles and a [[CaveBehindTheFalls convenient location]].
* ThemeNaming: Three characters in ''Blue World'' opt to go by their initials. Salvage master Gaston Gray goes by "GG", salvage client Franklin Fischer is "FF", and there's the mysterious, amnesiac acquaintance of Nancy's who goes by "ML" [[spoiler:who could well be Jean-Eric's son Matthias.]]
* TimedMission: Technically you can only spend ''x'' number of minutes underwater at a time due to your oxygen tank depleting, but you receive a straighter example [[spoiler:at ''Blue World'''s finale as the whales cause the ruins to collapse.]]
* TitleDrop: Kat does one at the end of the original:
--> "And we can keep trying to protect this amazing, endless ocean of ours."

** In the sequel, the scene where Matthias' letter is read drops both the series title and this installment's NA subtitle. Also, the series title is part of the title for completing that same chapter, the final one in the main story.
* TurtleIsland: After [[spoiler: you rescue the dog, you can find him barking at an island during the day, but the island suddenly disappears. When you go diving near the area, you will eventually find a Legendary Creature: A giant Leatherback Turtle whose shell is easily mistaken for a small island.]]
* UndergroundLevel: Great Aqua Cave, and some parts of the Abyss. [[ExactlyWhatItSaysOnTheTin Deep Hole and the Zahhab Depths]] in ''Blue World''.
* UnderTheSea: Do we really need to explain this one?
* UnderwaterRuins: The Mo'ia Atoll (Marige Atoll in the UK release) area; Triton Village, Valka Castle and Okeanides in ''Blue World''.
* {{UST}}: Some hints of it between the player character and Kat, descending into LesYay if you chose a female avatar.
* ViolationOfCommonSense: You can pet a lionfish with no ill effects.
** Let me repeat that: '''''YOU CAN PET A LIONFISH.'''''
*** [[strike:Thoroughly]] Partially averted in the sequel; merely brushing up against a lionfish results in the player getting bars off his oxygen gauge knocked away. (you can still poke it, though) However, a whole new series of problems opens up from the wider range of locations. Such as wearing only swim trunks/a bikini in to the Arctic/Antarctic with no ill effects, including onto the land excursions.
*** Hayako developed a *snicker* special insulating wax that you rub all over your body, remember?
** Normally diving hours are restricted. Divers are forced to use tables to calculate the amount of hours they can safely dive on a day, depending on the depth and time they already spend underwater. None of the characters follow these rules however. In RL they would all get serious illnesses.
*** We might call that an AcceptableBreakFromReality, as otherwise the game might become a bit annoying to play (something that can and does sometimes happen to simulation games that try to be ''too'' realistic).
** The ease which you can deep dive in both games is taxing the suspension of disbelief, because you go to depths usually reserved for only the most professional. The worst however is the fact you can take a 15 year old[[note]]minimum, but not too much older than that, at any rate[[/note]] to that depth. You do NOT take minors deep diving, ever. The depth can cause serious permanent damage to a growing body.
** In the aquarium, you can display the following in the Main Tank at the same time: predator and prey; natural enemies; and freshwater fish and saltwater fish. The first two are also true of the Marine Life Annex. In all cases, it seems like a recipe to lose one, the other, or both.
** With the exception of a few plot-related sequences, you can always go back to the boat, no matter where you are or how deep you are, even on the threshold of running out of air, even surrounded by aggressive creatures. Real-life divers cannot take that kind of liberty with their air, especially as surfacing too quickly has its own problems... and you can run yourself so low on air that you would have no other choice, but it will never matter in-game.
* VoiceWithAnInternetConnection: Kat and Jean-Eric.
* WideOpenSandbox
* WhereItAllBegan: The Great Aqua Cave is one of the first places you go in the first game, but you return to it later on and enter the [[spoiler: White Room]].
* WhereTheHellIsSpringfield: The Manoa Lai region is vaguely placed in the South Pacific Ocean, which isn't exactly known for being small. ''Blue World'' started averting this with the help of an in-game globe.
* WhyDidItHaveToBeSnakes: Ironically, Kat is severely aquaphobic. [[spoiler:Her father Patrick]] died while on a dive when he got tangled up in kelp and eventually drowned. Seems fairly reasonable that she might have an aversion to diving after that.
** Some fans have gone a little bit overboard with this, no pun intended. There are some (very complicated) theories involving the game's internal mythology and specific bits of dialog/mail that suggest that she might either [[spoiler: turn into a mermaid or cause some sort of catastrophe]] if she ever enters the sea. WildMassGuessing at its finest.
* WidgetSeries: Boy howdy. Not many gamers knew how to react to a franchise which, compared to other games, really has no ultimate goal, even though ''VideoGame/SimCity'' has been doing that for years.
* TheWorldIsJustAwesome: Any time you discover a new major landmark, you're given a cinematic pan-around to showcase it from the best angles. And of course, then you can explore them at your leisure.
* WorkplaceAcquiredAbilities: Oceana illuminates all nearby zoom-in spots and can offer tours of landmarks; Gaston notifies you of nearby salvagables and holds onto five extra items; Hayako provides a radar of nearby species and allows for reviewing of special fauna behaviors (read: {{cutscene}}s); and the helper dolphins swim you around faster and can locate specific types of salvagables.
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