History VideoGame / Deeeepio

* SmallTaxonomyPools: Notably averted. Unlike other animal centric ".io" style webgames, Deeeep.io is notorious for featuring only real aquatic (or semi-aqautic) species, many of them are rarely seen in media, such as Cuvier's beaked whales, sarcastic fringeheads, giant salamanders, icefish, cavefish, goblin sharks, gar, spider crabs, thresher sharks, olms, horseshoe crabs, auks, bobbit worms, cookiecutter sharks, mahi mahi, wolf eels, halibut, giant isopods, lampreys, barreleye fish and many, many more.

* SmallTaxonomyPool: Notably averted. Unlike other animal centric ".io" style webgames, Deeeep.io is notorious for featuring only real aquatic (or semi-aqautic) species, many of them are rarely seen in media, such as Cuvier's beaked whales, sarcastic fringeheads, giant salamanders, icefish, cavefish, goblin sharks, gar, spider crabs, thresher sharks, olms, horseshoe crabs, auks, bobbit worms, cookiecutter sharks, mahi mahi, wolf eels, halibut, giant isopods, lampreys, barreleye fish and many, many more.

* PiranhaProblem: Piranhas are strongest Tier 1 creature, but that's nothing. What makes them really unique is the ability to stick with it through the entire game, opting to simply add another piranha to a growing swarm every time it ascends a tier, instead of evolving into a higher-tier animal.

* SmallTaxonomyPool: Notably averted. Unlike other animal centric ".io" style webgames, Deeeep.io is notorious for featuring only real aquatic (or semi-aqautic) species, many of them are rarely seen in media, such as Cuvier's beaked whales, sarcastic fringeheads, giant salamanders, icefish, cavefish, goblin sharks, gar, spider crabs, thresher sharks, olms, horseshoe crabs, auks, bobbit worms, cookiecutter sharks, mahi mahi, wolf eels, halibut, giant isopods, lampreys and many, many more.

* AbnormalAmmo: Polar bears can shoot snowballs at other animals, and Goblin sharks shoot a jaw at the target.

* FragileSpeedster: With "only" 750 HP, Marlins are the most fragile Tier 10 animal, as most other top-tier animals have 900, with sperm whale at 1200 and blue whale at 1500; Sunfish and Stonefish may also have 700 HP, but their armor absorbs at least half the damage, often effectively doubling their health. However, Marlin is both 20% faster than any other creature of its tier, and has 100% Armor Penetration due to its rostrum.

** The Giant Squid is not the only squid that is giant, as the Colossal Squid is also present. Rather than a grapple move, it rakes the spikes on its tentacles into other creatures.

* AlluringAnglerfish: One of the Tier 7 choices. Just standing still causes their body to become invisible, while their lure suddenly resembles a generic piece of food any player has eaten by the hundreds to get anywhere.
** As the type of food the anglerfish's lure is will be dictated by what it last ate, the anglerfish can hide immediately after eating the meat dropped by killed players to have a much more alluring lure.

* FriendlyPlayfulDolphin: Averted. Tier 9 and 10 animals are the only ones who get to eat human swimmers. Dolphins are Tier 9. They are also among the more likely to attack, due to them being high on the evolutionary ladder.

''[[http://deeeep.io/ Deeeep.io]]'' is a MMO game made by Federico Mouse on November 9, 2016. It is an EndlessGame where you start off as one out of 4 tiny fish (or an aquatic worm, if that's what you would rather be) and begin to consume food, while trying to avoid getting eaten by the other players. Once you have eaten enough, you'll be able to evolve into a stronger animal, and you can do so up to 9 times, with multiple choices available at each tier.

**

** One of the buyable skins for the duck resembles the titular domestic goose from a certain video game.

* ZergRush: The tactics of the piranha players. Piranha is a Tier 1 fish that has the largest health at 300 (vs. 150 for the default Clownfish and Cavefish, 100 Worm and 200 for Icefish, Blobfish or even Tier 2 Crabs) and largest damage at 30, vs. 10-20 of the other options. Afterwards, you can evolve into first the parasitic lamprey, and then the other animals of corresponding tiers...or you can choose to keep adding on an extra piranha per tier, until you become a fearsome swarm of 10, a threat to even the whales and a force easily capable of devouring humans.

While the game is centered around the watery environments, including the titular deeeep, not all of the animals are fish or fully aquatic. You can also choose watergoing land-dwellers like frogs or beavers, or even the aquatic birds like Ducks and Pelicans. Each is fitted to survive in either one or two specific biomes, or at most several different ones: none are able to comfortably survive in all biomes, and some will outright die if you evolve into them while being in a wrong location.

Thus, there's the Ocean itself, where players start off in, the Ocean Deeeep, Ocean surface for the air breathers, the Arctic + Arctic surface and swamp + swamp surface. Being in a wrong area will immediately weigh on one of the relevant meters: fish that are literally out of water will start losing oxygen, but so will birds and beavers when they dive underwater. Creatures not suited for the Arctic will see their temperature gauge go down; this also happens to Arctic dwellers leaving their area, as they slowly overheat. Arctic or Oceanic water dwellers going into the swamp experience salinity loss, and swamp swimmers likewise find ocean water too salty. Lastly, any dweller of the deeep swimming upwards elsewhere will soon suffer from the pressure drop; equally, every other creature feels overpressured if it ever ventures down there.

* AbnormalAmmo: Polar bears can shoot snowballs at other animals, and Goblin sharks shoots a jaw at the target.

* ArtisticLicenseBiology: When compared to ''VideoGame/{{Mopeio}}'' and ''VideoGame/FlyOrDieio'', ''Deeeep.io'' is by far the most realistic of the three; it doesn't feature any dragons or star-eating space creatures, for one thing. Literally any animal in it actually exists in real life, no matter if it's [[https://en.wikipedia.org/wiki/Blobfish Blobfish]], [[https://en.wikipedia.org/wiki/Icefish Icefish]], [[https://en.wikipedia.org/wiki/Barreleye Barreleye]] or [[https://en.wikipedia.org/wiki/Mahi-mahi Mahi-mahi]]. Nevertheless, there are some notable ways where even abstract biological facts take a back seat to RuleOfFun.
** The game allows all Tier 9 and 10 animals to attack and kill human swimmers and get experience points for it. This obviously makes sense for great white sharks, hammerhead sharks or even giant squid, and while whales/dolphins/orcas intentionally killing humans for score points is a stretch, one can let it slide. However, other examples include marlins and [[https://en.wikipedia.org/wiki/Oarfish oarfish]], or even seals, '''bald eagles''' and [[https://en.wikipedia.org/wiki/Manatee#Relation_to_humans Manatees]], which are slow and far better known for being hunted then even theoretically harming humans. At least the stonefish and sunfish were excluded due to the ridiculousness of them bringing down a human, but it only raises the question why the other animals no more likely to kill one retain this power.

** Dragonfish sound cool, so the game gives them the ability to slow down prey by emitting red glare, which is cool, but obviously has nothing to do with reality. In RealLife, [[https://en.wikipedia.org/wiki/Dragonet dragonfish]] '''do''' have powers that can be gamified; they are able to near-instantly bury themselves in the ocean floor, and they can also spray foul substances like some marine skunks. However, such defensive abilities would require placing it somewhere below Tier 8, where the majority of in-game creatures have long become prey. (Moreover, snapping turtle can already hide like this, but also produces bait food drop near its hiding spot.)
* BearsAreBadNews: Polar Bears are Tier 10. While their stats are pretty standard for the top tier, the ability to throw stunning snowballs makes them the main nemesis of the Blue Whale (since the latter is largely reliant on sucking in water in a vortex to do damage, which will draw in the snowball and leave them defenceless.)

* BirdPoopGag: Playing as a Seagull will cause you to spawn Bird Poop every 10 seconds of in-game time. Moreover, low-tier aquatic creatures can then eat it.
* CombatMedic: Oarfish cannot attack Tier 1 to 5 animals, and will heal them instead. Those of higher tiers are fair game. Oh, and they can attack, and kill, human swimmers too, somehow.
** Manatees will also heal other animals around them. They also retain the ability to kill and eat human swimmers, which is one of the least realistic parts of the game.

* DisabilitySuperpower: A real biological example: Tier 1 Blind Cavefish only see within a very narrow radius, but they detect bodily vibrations within a much greater range.
* EnemyDetectingRadar: See DisabilitySuperpower above for Blind Cavefish.

** Bald Eagles will have icons for the offscreen animals show up, to represent just how good their eyesight is. Those icons will even appear faint for the distant animals and large and opaque for ones just-offscreen.
* EvolutionaryLevels: Here, there are 10 tiers of the evolutionary ladder, which also diverge and spread out multiple times, so that the total number of animals is 43.
* FragileSpeedster: With "only" 700 HP, Marlins are the most fragile Tier 10 animal, as most other top-tier animals have 900, with sperm whale at 1200 and blue whale at 1500; Sunfish and Stonefish may also have 700 HP, but their armor absorbs at least half the damage, often effectively doubling their health. However, Marlin is both 20% faster than any other creature of its tier, and has 100% Armor Penetration due to its tusk.

* MasterOfDisguise: Basic, Tier 4 Squid become invisible if they stand still. Octopi outright assume the appearance of the last animal they have killed.

* NoSell: A Giant Squid trying to grab a Cachalot (sperm whale) will instead be rebuffed, and lose 5% of its health alongside it.
** Sunfish, Oarfish and Sea Turtles are completely immune to poison.
* OxygenMeter: Present for nearly all animals. Given the game's theme, it'll start draining on the ''surface'' for the majority of playable animals, with air-breathers like seagulls being the exceptions. Crabs feel fine both underwater and on the surface.
** King crabs also don't have oxygen problems above water, but the overly low pressure compared to the deeeep they are used to will still damage them over time until they crawl back to the deeeep.
** (Blue) whales have the ability to suck in water and any nearby creatures that are not too large with it. If they are below tier 6, they cannot be damaged, and will instead simply travel inside the whale until it surfaces and spits them out. However, seabirds will eventually suffocate inside the whale.
* PiranhaProblem: Piranhas are strongest Tier 1 creature, but that's nothing. What makes them really unique is the ability to stick with it through the entire game, opting to simply add on another piranha every time you ascend a tier, instead of evolving into a higher-tier animal.
* PsychoElectricEel: Downplayed; they are a Tier 9 animal, and their electricity works well...but it is mainly a defensive measure, since the electricity cannot be projected outside their body.
* RegeneratingHealth: Present by default, unless you are suffering from not being in your element. Icefish has a key advantage over the other Tier 1 options due to regenerating health 3x faster when it is completely still.

* RisingUpTheFoodChainGame: Subverted. Unlike both ''VideoGame/{{Mopeio}}'' and ''VideoGame/FlyOrDieio'', where the player-controlled animals of lower tiers are nearly always strictly prevented from harming those of the upper tiers, while upper tiers can prey on nearly anything below it (leading to hedgehogs chasing deer and hornets stalking bats), here, any animal can harm nearly any other animal (with several exceptions for each: see FriendlyFireproof above), and will get XP through Meat drops if they succeed. Thus, there's no UltimateLifeForm like Mope.io's Black Dragon or FlyOrDie's Grim Reaper either; just '''twenty two''' Tier 10 animals instead, to punctuate that while gaining tiers is obviously beneficial as it still raises stats, the focus is on the ecosystem and how your playstyle fits into it.
* ShoutOut: You can find an "Abandoned House" on the map, which looks exactly like the pineapple [[WesternAnimation/SpongebobSquarepants a certain sponge lived in]], now missing its top and in obvious disarray.
* SonicStunner: The special ability of the tier 10 Cachalot (better known in English as a [[https://en.wikipedia.org/wiki/Sperm_whale sperm whale]], and a notable predator.) It doesn't completely stun its targets, but a 35% speed reduction is still nothing to sneeze at.

* StatusBuff: Tier 9 Manta Rays have Auras that buff smaller animals travelling near them; notably, the exact nature of a buff is different for each animal.

** In a broader sense, several other, mostly underwater objects can also be used as static cover. Tree Beavers and Ducks can hide in beaver dams. and all but the Tier 10 animals can hide inside the Shipwreck and the Abandoned House.
* UltimateLifeForm: Averted. The evolutionary tree of the game only broadens, and there are '''twenty two''' animals in the Tier 10; more than in Tier 1, 2, 3 and 4 '''combined'''. This is so that the players who endure through the entire game would always have something to best fit their playstyle. Thus, while Tier 10 obviously includes the cool, massive creatures like whales, giant squid, and great white sharks, it also features rather less iconic Marlins for the players who really like fighting with tusks, and the small, yet armored stonefish and sunfish. (The latter is a defence-focused StoneWall with complete immunity to poison; the former is more of a MightyGlacier, as it does substantially more damage while retaining respectable defence.) Notably, Piranha enthusiasts can just ascend to that ultimate stage with a swarm of 10 piranhas.

* BeastMaster: Whale sharks can summon [[https://en.wikipedia.org/wiki/Remora remora fish]], which will follow them and fight for them.

* RisingUpTheFoodChainGame: Subverted. Unlike both ''VideoGame/{{Mopeio}}'' and ''VideoGame/FlyOrDieio'', where the player-controlled animals of lower tiers are nearly always strictly prevented from harming those of the upper tiers, while upper tiers can prey on nearly anything below it (leading to hedgehogs chasing deer and hornets stalking bats), here, any animal can harm nearly any other animal (with several exceptions for each: see FriendlyFireproof below), and will get XP through Meat drops if they succeed. Thus, there's no UltimateLifeForm like Mope.io's Black Dragon or FlyOrDie's Grim Reaper either; just '''twenty two''' Tier 10 animals instead, to punctuate that while gaining tiers is obviously beneficial as it still raises stats, the focus is on the ecosystem and how your playstyle fits into it.

* PsychoElectricEel: Downplayed; they are a Tier 6 animal, and their electricity works well...but it is mainly a defensive measure, since the electricity cannot be projected outside their body.