History Main / PocketDimension

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* ''Literature/Mouse2017'': [[spoiler:{{Emotion eater}}s use a spell called the Antiochus Algorithm to unmake and remake the world, creating a pocket universe of AlienGeometries where, like in a video game, trying to leave one side of the map causes you to reappear at the other, causing a constant rain of groundwater from the sky. The surviving humans live in starvation and terror, which is great for the monsters.]]
* ''Literature/ReignOfTheSevenSpellblades'': "Grand arias" are RitualMagic spells considered the pinnacle of a school of magic, which allow the mage who casts them to locally [[RealityWarper rewrite the laws of the universe]] to their preferences. In volume 3, Ophelia Salvadori casts one that allows her to endlessly produce chimeras, while in volume 8, [[spoiler:Cyrus Rivermoore attempts to use one to wall off his laboratory from TheGrimReaper so he can resurrect the ghost of an ancient {{necromancer}} long enough for her to pass on her lost knowledge]].

* [=ZPMs=] in ''Series/StargateSG1'' and ''Series/StargateAtlantis'' contain a pocket of artificial subspace-time from which vacuum energy is extracted. The Ancients, and Rodney, experimented with doing the same thing in the real universe. The results were... [[TheEndOfTheWorldAsWeKnowIt catastrophic]]. "The problem is, we have to live in this universe."

** ''VideoGame/BaldursGate II'', a video game based on the ''TabletopGame/DungeonsAndDragons'' Forgotten Realms setting has one level in which you can follow a kidnapped band of actors into a pocket dimension where slaves with {{Shock Collar}}s are ruled over by demons who live in O Ring Orifices.
*** The ''Throne Of Bhaal'' expansion/'sequel' gave the PC their own pocket plane, a lovely little pied-Ã -terre situated just off Bhaal's layer of the [[{{Hell}} Abyss]] and within easy commuting distance of ''anywhere''.

* In the ''TabletopGame/OldWorldOfDarkness'', pretty much every species of playable monster had a way of creating one of these with enough magical energy around leylines, calling them invariably: Dragon Nests, Nodes, Caerns, Freeholds, and Haunts.
* The ''TabletopGame/NewWorldOfDarkness'' gives [[TabletopGame/MageTheAwakening mages]] a few ways to make these.
** The Space Arcanum lets a mage make a BagOfHolding; more advanced spells can make a space BiggerOnTheInside and cut it off from the world so that it's only accessible along a very specific path.
** The Metachronal Clock[[note]](In the ''Mysterium'' sourcebook.)[[/note]] acts as the key to a labyrinthine pocket dimension that exists outside of time.
** Archmasters' souls ''are'' spiritual {{Mental World}}s which they can augment with Chantries, entire landscapes copied from the physical world.

* ''TabletopGame/{{Hackmaster}}'' 1E. Bags of Endless Storage and Bags of Hefty Storage Capacity access an extra-dimensional area called "Bagworld".
* ''TabletopGame/{{Exalted}}'' has the aptly-named Elsewhere. Things stored in it are "safe enough", in that it can't be taken back except by the person storing it, and things stored by different person won't interact with each others. It has been used to store weapons, souls (in an AndIMustScream fashion), and ''a frickin' Primordial'' that is a world in itself.
** You can ''become'' one, if you're ascend into a Green Sun Prince. It's a world defined as you like it, you can invite others to live in it, and it grows as you feed it [[{{Mana}} Essence]].
* Among the the adventures for West End Games' ''Franchise/StarWars: The Roleplaying Game'' is a pair entitled ''Otherspace'' and ''Otherspace II: Invasion''. These take place in the titular Otherspace, a pocket dimension between hyperspace and realspace. The only extant species from Otherspace is the [[AlwaysChaoticEvil Charon]], most of whom followed the [[ReligionOfEvil Cult of the Void]], better known as the [[NamesToRunAwayFromReallyFast Charon Death Cult]]. Their primary belief was that all life, including their own, was an abomination and should be returned to the Void of Death. Oh, and there were other species in Otherspace. Not anymore.
* The ''TabletopGame/{{GURPS}}'' supplement ''Thaumatology: Ritual Path Magic'' contains a spell called "Create Pocket Dimension," which is ExactlyWhatItSaysOnTheTin.
* Creator/GamesWorkshop games:
** ''TabletopGame/{{Dreadfleet}}'' is set in the Galleon's Graveyard, a near mythical, nautical realm said to draw shipwrecks and the remains of anything that dies in the ocean into its cursed waters. Inhabited by numerous [[TheUndead undead]] creatures, the Galleon's Graveyard is only accessible by arcane means and has been used by the vampire pirate Count Noctilus as a base of operations for his Dreadfleet for decades.
** In ''TabletopGame/Warhammer40000'', [[MechanicalLifeform Necron]] [[ColdSniper Deathmark assassins]] typically follow the progress of a battle from a pocket dimension known as a hyperspace oubliette. When the they deem the time is right, Deathmarks are able to deploy straight into an optimal sniping position and take their target completely by surprise. This ability is represented in the game itself by allowing the player to deploy their Deathmark squads during a game rather at the beginning. Unlike such abilities used by other units however, most editions of the game allow the Deathmarks to deploy during the opponent's turn, usually when the unit they are targeting enters the battlefield.

* In ''VideoGame/{{Scrapland}}'', The Great Database has one inside it. That's where the matrix of all the robots in Chimera are stored.

* ''Franchise/TouhouProject'':
** The primary setting of the series is a FantasticNatureReserve called Gensokyo. It used to be merely a region deep in the mountains of Japan, but when belief in gods and {{youkai}} start waning, it was sealed off from the rest of the world so the supernatural can keep existing. That said, stuff from the Outside World still end up inside from time to time, either by accident or by someone messing with the Barrier.
** Taoist hermits can create their own miniature worlds called Senkai. This is actually a plot point in ''VideoGame/TouhouShinpirokuUrbanLegendInLimbo'', as the Occult Balls can break Gensokyo's barrier, but is powerless inside the Senkai because they're technically separate worlds.

* ''Franchise/{{Halo}}'': The Forerunner Shield World "Trevelyan", introduced in ''Literature/HaloGhostsOfOnyx'', is an enormous DysonSphere contained within a 23-cm slipspace bubble. Furthermore, Forerunner Slipspace Pods also trap their occupants in pocket dimensions, so some characters in ''Ghosts of Onyx'' ended up locked in a pocket dimension within a pocket dimension.
* In the ''VideoGame/DivineDivinity'' series:
** The first game has a goblin living inside a crystal ball carried by another goblin. When the hero looks into the ball, he is sucked inside it and reappears in a small garden near a mansion where the goblin lives. There a quite a share of uncanny things there too, such has sudden bursts of rain, a war between bees and wasps (with each side asking you for support and none being the "good" side) and a lot of closed recipients with a handful of keys lying around.
** ''VideoGame/DivinityOriginalSinII'': The Imps created a pocket universe, accessed through a gemstone, in the form of an EternalEngine that's programmed to determine what the universe is. It estimates that its calculations will be complete in 358 910 227 years.

* There are Pocket Dimension portals in ''VideoGame/{{Runescape}}''... [[MundaneUtility Used for holding PC houses.]]
* ''Franchise/TheElderScrolls''
** In the series' lore, Oblivion is the [[VoidBetweenTheWorlds infinite void]] surrounding Mundus, the mortal plane. Oblivion itself contains tens of thousands of realms, ranging from the Daedric Planes (ruled by their associated [[OurGodsAreDifferent Daedric Princes]] and function as combination {{Eldritch Location}}s, {{Genius Loci}}s, and {{Fisher Kingdom}}s) to various "pocket realms", some of which are no larger than a single room.
** In ''[[VideoGame/TheElderScrollsIIIMorrowind Morrowind]]'', the Dremora Lord Dregas Volar, wielder of the last [[LegendaryWeapon Daedric Crescent Blade]], has been [[SealedEvilInACan sealed inside]] of Magas Volar, [[SealedRoomInTheMiddleOfNowhere a Daedric shrine not physically connected to the outside world]] and only accessible with a magic amulet. Defeat him, and you automatically get teleported back out, with the Crescent Blade now in your possession.
** In ''[[VideoGame/TheElderScrollsIVOblivion Oblivion]]'', you go inside a painting for the quest "A Brush with Death." [[spoiler:Mankar Camoran's Paradise]] may count, as well.
* ''VideoGame/BaldursGateIIThroneOfBhaal'' gives the protagonist his or her own pocket dimension that can be accessed at almost any time and be used to store extra equipment or party members. It also comes with a little imp butler who acts as the game's UltimateBlacksmith.
* ''Franchise/{{Kirby}}'''s stomach is shown to be an ''entire universe'' as evidenced in the [[Anime/KirbyRightBackAtYa anime]]. This explains how Kirby is able to inhale and swallow things many times his own size and then instantly regaining his form. What happens when something enters here seems to vary. Between the games and anime, and object he inhales is either destroyed/erased instantly, turned into a star and absorbed or spat out, or simply just stays there until Kirby decides to use it. ''VideoGame/KirbySqueakSquad'' takes advantage of the storage functionality by making his stomach universe a StomachOfHolding where he can hold and mix items.
** There's also [[spoiler:Forgo Dreams]] in ''VideoGame/KirbyAndTheForgottenLand'', a strange dimension created by [[spoiler:[[BigBad Fecto Forgo]]]] for their soul to retreat to after their true form is destroyed at the end of the game. Being their dream world, which contains memories of the New World, [[spoiler:Forgo]] can alter anything in it, such as including aspects of other levels. They also created [[spoiler:Phantom versions of the Beast Pack ([[MyFriendsAndZoidberg and Tropic Woods and Meta Knight]]) to rebuild their army, and has also shattered the soul of the Beast Pack's leader, [[DistressedDude Leongar]]]], into 300 pieces so they can possess him and use his body to continue their plans]].

* ''VideoGame/Prey2006'''s [[spoiler: final boss fight]] takes place in one of these. Its origin and purpose are not clear, but judging by the mining explosives found there, it might be used by the aliens for storing extra-large asteroids prior to mining.
* In ''VideoGame/DungeonsOfDredmor'', you might find some Wizard Keys, which can be used to access your very own Pocket Dimension. However, since "time does not flow normally" in this dimension, you can't eat, drink, or cast spells while in this dimension. You can, however, use it to pocket items you've found for later use, decorate the walls to your liking, or use the included portal to travel to the Wizardlands ([[BonusLevelOfHell or Diggle Hell]]).
* Demons in ''VideoGame/ShinMegamiTenseiIV'' can create Domains, which are destroyed when the demon dies. They are all fairly large, but [[spoiler: Purgatorio and Lucifer Palace]] are ''gigantic''.
* In ''VideoGame/{{Terranigma}},'' Ark starts his adventure by opening a mysterious box, releasing a strange creature called Yomi. The box contains a small pocket dimension with four separate rooms in it, allowing Ark to use it as his inventory. To enter the inventory screen, Ark actually puts the tiny box on the floor and dives into it.
* ''Franchise/KingdomHearts'':
** Zexion's Absent Silhouette battle in the ''Final Mix'' version of ''VideoGame/KingdomHeartsII'' gives him one inside his book, which contains more books for him to hide among.
** The [[WesternAnimation/SnowWhiteAndTheSevenDwarfs Magic Mirror]] gets an internal pocket dimension in ''VideoGame/KingdomHeartsBirthBySleep'' courtesy of a potion created by the Evil Queen when she attempts to pull a YouHaveFailedMe on Terra. The mirror pulls him in for a boss fight on an endless mirrored surface with columns of smoke in every direction on the horizon. [[VideoGame/KingdomHearts02BirthBySleepAFragmentaryPassage The sequel]] ups the ante by expanding it into more pocket dimensions containing pieces of the dwarves' mine and the queen's castle, all connected by more mirrors.
* ''VideoGame/SCPContainmentBreach'' Don't get caught by 106.
* If a Trapper [[{{Teleportation}} traps]] you in ''VideoGame/EternalDarkness'', you're sent to the Trapper Dimension, a series of floating islands in the middle of a black void that exists outside of time. Magick doesn't work there, but it comes with handy floor panels which replenish your health, mana or [[SanityMeter sanity]] by standing upon them, and you escape by standing on a different floor panel.
* The main story element of ''VideoGame/ProjectSekai'' is the SEKAI, a type of pocket dimension that is created when the emotions of a certain group of people unite as one and can be accessed by humans in the real world when they receive an "Untitled" song. The SEKAI is a manifestation of those collective emotions, and when those people bring the emotion that they are searching for to fruition, the SEKAI manifests a song that represents what they've sought. SEKAI are also where the [[VirtualCelebrity "Virtual Singers"]] Hatsune Miku, MEIKO, KAITO, Kagamine Rin/Len, and Megurine Luka manifest as real people to guide the humans there to their true feelings.
* ''VideoGame/MentalOmega'': This is a key ability of the Allied Nations' [[TimeStandsStill Paradox]] [[TacticalSuperweaponUnit Engine]], having used the Euro Alliance subfaction's [[SpaceCompression Chrono]] technology to warp space within the vessel, allowing it to fit VASTLY more soldiers, tanks, planes, research, production and utility facilities within it, including it's own [[{{Teleportation}} Chronosphere]], than even its outer size would suggest it could carry.

* In ''Webcomic/{{Sinfest}}'', there are several pocket dimension that one can enter simply by crossing a invisible barrier marked out by a sign. [[http://www.sinfest.net/view.php?date=2012-10-12 One turns you into the opposite gender]] and the other [[http://www.sinfest.net/view.php?date=2013-01-27 turns everything within it to a realistic state.]] The latter starts to destroy any pure-blooded demons that go into it (one started to disintegrate, one seemed to have its heart stop, and another was set on fire). They will recover if they get out in time, though. Half demons are unaffected. Many males are depicted as half the height of females outside of the Reality Zone. Inside it, they grow to normal height. Also, the Devil's powers apparently don't work in the Reality zone.

* In ''Webcomic/ChampionsOfFaraus'' the inside of a Deitiy's avatar is a strange place. As seen in the short story "Spheres", it is entered through the Deitiy's face, is BiggerOnTheInside, lacks gravity, solid surfaces, and has another avatar inside it, [[MindScrew that is just as big as the outside one, and is simultaneously controlled at the same time]], and going in ''that'' avatar plops you where you were to begin with - outside of the original avatar.

-->--'''Film/Supergirl1984''

* ''VideoGame/MentalOmega'': This is a key ability of the Allied Nations' [[TimeStandsStill Paradox]] [[TacticalSuperweaponUnit Engine]], having used the Euro Alliance subfaction's [[Teleportation Chrono]] technology to warp space within the vessel, allowing it to fit VASTLY more soldiers, tanks, planes, research, production and utility facilities within it, including it's own Chronosphere, than even its outer size would suggest it could carry.

*** In Post-Crisis continuity, the Time Trapper created a pocket universe which events from the Pre-Crisis/Silver Age ComicBook/{{Superboy}} stories took place. Anytime the ComicBook/LegionOfSuperHeroes travelled back to meet their inspiration Superboy in the original stories, the Time Trapper diverted them to there according to this retcon. In this Pocket Universe, the only inhabitable planet is Earth (and so was Krypton), and the only superhero was the Pocker Universe Superboy. In ''ComicBook/TheSupergirlSaga'', it became a dead world after Zod, Zaora, and Quex-Ul killed everyone on Earth, following Superboy's death by the Time Trapper, and it was retconned out of existence during ''ComicBook/ZeroHourCrisisInTime''. The Doylist reason this was created is because DC had to clean up the ContinuitySnarl caused by their ContinuityReboot of Superman while leaving the Legion alone. However, [[VoodooShark it only made the snarl worse]], forcing the Legion titles to perform several more soft reboots before a full scale reboot during Zero Hour.

*** In Post-Crisis continuity, the Time Trapper created a pocket universe which events from the Pre-Crisis/Silver Age ComicBook/{{Superboy}} stories took place. Anytime the ComicBook/LegionOfSuperHeroes travelled back to meet their inspiration Superboy, the Time Trapper diverted them to there. The only inhabitable planet is Earth (and so was Krypton). In ''ComicBook/TheSupergirlSaga'', it became a dead world after Zod, Zaora, and Quex-Ul killed everyone on Earth, following Superboy's death by the Time Trapper, and it was retconned out of existence during ''ComicBook/ZeroHourCrisisInTime''. The reason this was created is because DC had to clean up a ContinuitySnarl caused by their ContinuityReboot of Superman, but it only made the snarl worse.