History Main / NumberedHomeworld

** And when finding out what life would be like if it were a video game, it turns out the VideoGame/SpaceInvaders were from the planet Creator/{{Nintend|o}}u [[UsefulNotes/{{Nintendo 64}} LXIV]].

** A minor war has also been fought in astronomical circles regarding the designation of the ''PSR B1620−26'' system consisting of a binary pulsar (the titular ''PSR B1620−26'') and white dwarf (designated ''WD J1623−266'') as well as a sub-brown dwarf/very large planet orbiting them booth. The problem regards the last part as, using traditional naming methods, it would be designated ''"PSR B1620−26 c"'' which it cant be according to many astronomers as that would make the white dwarf ''"PSR B1620−26 B"'' and ''"PSR"'' is only used to designate pulsars. The planet instead being designated by them as ''"PSR B1620−26 b"'' with the white dwarf not being mentioned but (as argued by other side) creating another problem by making it hard to know what part of the system you're referring to.

* ''Franchise/{{Metroid}}'':
** Tallon IV, although it's sort of confusing in ''VideoGame/MetroidPrime''. There's a room that gives you a holographic display of the solar system. [[NonIndicativeName Tallon IV is actually the fifth planet]] in that system and the system itself is called the Ooromine System. There is an Ooromine II, but the other planets have distinctive names. This includes Zebes (the planet of the original ''VideoGame/Metroid1'' and ''VideoGame/SuperMetroid''), Billium and Twin Tabula.
** The Metroid home planet is [=SR388=]. Justified as the name is a catalog name given by the Federation. The planet was never colonised by them (due to certain nasty energy-sucking jellyfish-things) and so there's no reason for a proper name. ''Dread'' demonstrates the Chozo who lived there called it "Agar Nalima".
** Samus' own home colony is [=K2-L=], which was little more than a small mining settlement.
** ''VideoGame/MetroidDread'' takes place on a planet simply called "ZDR", another catalogue entry. The Chozo who actually lived there refer to it in dialogue as "Tari Nalima".

* ''VideoGame/EndlessSpace'' uses it. Even your empire's homeworld is literally a numbered homeworld. Ironically, a later patch added ONE properly-named planet to the game... Auriga, which isn't a homeworld to any of the established factions, but IS the planet where ''VideoGame/DungeonOfTheEndless'' and ''VideoGame/EndlessLegend'' took place.
* ''VideoGame/EndlessSpace2'' gives each empire's starting planet a unique name, averting this trope. It goes further by giving players the option to rename any planet they colonize, meaning you could have an entire empire of unique planets if you so choose.
* ''VideoGame/{{Starbound}}'' plans on this with the star name, then the number with Roman numerals and then moons around said planets are given alphabetical designations in order of closest to farthest. One example could be Alpha Nu Aql Majoris III b. The player's homeworld, however, can be named.

* In the [[FourX 4X]] game ''[[VideoGame/GalacticCivilizations Galactic Civilizations II]]'' the homeworlds of the various species and the other planets in the same system have proper names. Other systems with no native intelligent species however have planets with Star Name + Number. The player is free to rename them though when colonized.
** Minor races have their planets named after them. Some, like the Dark Yor, even have their own solar system (following the standard naming convention for the various planets).
** The campaign maps usually have a few planets with unique names.
* The ''VideoGame/StarOcean'' series uses both this and proper names for planets. For example Earth is also known as Sol III while [[VideoGame/StarOceanTheSecondStory Expel]] is also known as Arcura IV.
* The second and third ''VideoGame/MasterOfOrion'' games all have numbered planets. You can name the star though, so you can settle on Trope IV.
* In ''VideoGame/{{Xenosaga}}'' all of the capitals of Galaxy Federation have been named _th Jerusalem, with Earth being named Lost Jerusalem, and the capital during the game's events Fifth Jerusalem.
** There's also the planet of Second Miltia, suggesting that other planets are numbered in this way.
* By default, ''VideoGame/{{Outpost 2}}'' names the planets in this way while using the names of real stars, resulting in planet names like "Sigma Draconis I" or "Delta Pavonis II." You can, however, rename the planet to your liking, and ''Outpost 2'' simply calls the planet "New Terra."
* ''VideoGame/FreeSpace'' has Altair V, Cygnus Prime, Deneb II, and Deneb III.
* ''VideoGame/SystemShock2'' is set around Tau Ceti V.
* Averted in ''Franchise/MassEffect''. Most planets and solar systems that you visit in the game have already been explored by someone, and as such already have names associated with them. Even lifeless rocks in distant nebulae have names. Some come from human mythology and history, but most have been named by the various alien races that have already been established in the galaxy for millennia. The only exceptions are 2175 Aeia and 2175 [=AR2=], never formally explored and thus never given a name beyond the scientific designation.
** The very first planet ever visited in the series has the designation Eden Prime, even though no other Eden planets are ever encountered. The name is most likely symbolic. In the Bible, Eden was the first terrestrial human settlement and was a paradise until the humans got kicked out. In Mass Effect, Eden Prime was one of the first extra-solar colonies humanity established and was considered by many to be a paradise until the Geth invaded in the first game. (This plays on the mathematical notion of "prime", e.g. ''f'(x)'' is the first derivative of ''f(x)'').

* ''Franchise/DeadSpace'' has Aegis VII.
* In ''Franchise/StarTrek: Birth Of The Federation'', nearly all planets follow the trope. Earth and the Solar System planets are the exception. Interestingly, the first planet in a system is always called <star name> + "Prime". The rest attach Roman numerals. Cardassia Prime is the exception, as it is normally the second planet in the system, and the ''first'' planet is named Cardassia II.
** ''Star Trek: Bridge Commander'' starts with the destruction of Vesuvi III.

* ''VideoGame/{{Freelancer}}'' gives the sparsely populated Border Worlds names like "Sigma-14" and "Tau-23," while those under house authority are named after places on Earth, such as "New London" or "Frankfurt."
* It doesn't matter if it's your homeworld. In ''VideoGame/SpaceEmpires'' it'll still be called "[[ShoutOut Wolf]] [[Series/StarTrekTheNextGeneration 359]] VIII".

* In ''VideoGame/{{Ascendancy}}'', the player can name their colonies whatever they want, but the defaults are (Starname) (Roman numeral) (such as Hope II, Nougat IV, etc.)
* Several planets in ''VideoGame/SupremeCommander'' are named this way.
* ''Rigel's Revenge'': Rigel V.
* ''[=AltairVI=]'': It's right there in the title.
* ''VideoGame/SpaceQuest'', being a parody game series (the latter ones specifically parody ''Franchise/StarTrek'') play this trope to the fullest. The gameplay of the sixth game starts on planet Polysorbate LX. Of course, one has to wonder what sort of life is possible on the ''60-th'' planet in a star system. Actually, not much of a life. The place is a dump. And yet [[TheCaptain Captain]] [[CatFolk Kielbasa]] has chosen it for shore leave of the crew of the SCS ''[=DeepShip=] 86''. There are also planets Commodore LXIV, Delta Burksilon V, Klorox II, etc. Other planets seem to have proper names, though (e.g. Xenon, Kerona, Pestulon, Estros, [[{{Pun}} Kiz Urazgubi]], Gingivitis).
* Used regularly in the ''VideoGame/WingCommander'' series. Locanda II, Loki IV[[note]]which is also given as the system name on the galaxy map that came with ''Prophecy'', presumably an error by the graphics artist(s) involved[[/note]], and Mylon II come up as plot points.
* ''VideoGame/NoMansSky'': If it's not [[APlanetNamedZok named "Zok"]] or based on the conventions of NamingYourColonyWorld, then a planet will follow this convention. (Not only are there planets that follow this convention, but ''whole star systems'' do, too.) Examples include Usnusven II, Quidar II, Daiman IX, Noyade IX, Spekira II, Oria V, Ahktun VII, Soleth Prime, [[Film/{{Aliens}} LV-426]], Hx III, Darko IX, Utwarzers XI, and Vesta Prime. Sometimes can be invoked by players themselves as they keep track of where they've been and encountered Atlas Stations.
* In ''VideoGame/{{Stellaris}}'' uninhabited planets are numbered, moons have their primary's number plus a lowercase letter, but when colonized (or discovered to host a pre-FTL species) they are renamed with either a suggestion based on your empire's chosen naming convention, or something entered by the player. However, if you put a number of some other numerical designation in your homeworld's name the AI will suggest similar names[[note]]for instance, calling your homeworld [System Name]Prime will get your first colony in a system a similar name, while the second colony in a given system will be [System Name]Secundus and a third would be Tertius.[[/note]] The Solar System objects are given their RealLife names if the United Nations of Earth (or a custom Terran civilization) is in the game, but if Sol is not inhabited by a spacefaring race the usual custom is followed, and "Sol III" always happens to be inhabited by a non-spacefaring race of sentient humanoids (or post-apocalyptic pre-sentient cockroaches).

* ''VideoGame/EliteDangerous'', all but a handful of the billions of stars are numbered (either randomly generated, or pulled from a astronomical catalog), giving us beautiful names like "Eol Prou RS-T D3-94". Planets share the name of the star they orbit, and are assigned an alphanumeric code based on their orbit. Only a handful of planets or stars have an actual name; some are from previous games or are actually named in real life (such as "Sirius"), and a handful were named by kickstarter backers such as the infamous "Stapled Peacock Flesh", a terraformed Earth-like world.

* The first Exoplanet discovered period is called 51 Pegasi B. The "Pegasi" part might sound interesting, but that's only because its in the Pegasus consolation. Also note that "51" here refers to the star, which was called "51 Pegasi" before the discovery then renamed "51 Pegasi A" of the "51 Pegasi" solar system.

See also: APlanetNamedZok and NamingYourColonyWorld.

* ''TabletopGame/{{Starfinder}}'': [[TheEmpire The Veskarium]] names the vesk homeworld Vesk Prime and the other seven planets in their home system Vesk-2 through -8. However the natives have their own names for their home planets, for instance Vesk-3 is Oeddertchonk to the skittermanders and the pahtra of Vesk-6 insist it's called Pulonis.

* Franchise/TheDCU: Talok III, IV, and VIII, Beltair IV, Trigus VIII, Toomey VI.
* The Franchise/MarvelUniverse has Centauri IV, Sirius III-IV, Rigel III, Capella II (whose natives call it Lotiara), Arcturus IV, A-Chiltar III, Ciegrim-7, Horus IV, Maklu IV, Stonus I-V, Tarnax IV, Wundagore II and Power Planet 4.

* Asteroid B612, home to Literature/TheLittlePrince.
* The Literature/ChooseYourOwnAdventure book ''The Third Planet From Altair'': It's right there in the title.

** ''Literature/TheShipWhoSang'': Beta Corvi IV is home to a highly-advanced race of non-humanoid aliens in the chapter "Dramatic Mission".

* Creator/StanislawLem's ''The Invincible'': Regis III. It's the human name - the natives [[spoiler:probably called it something else, but came down with a bad case of extinct.]]

* ''LightNovel/BodaciousSpacePirates'' has Tau Ceti III (or Uminoakehoshi)

* The first Exoplanet discovered period is called 51 Pegasi B. The "Pegasi" part might sound interesting, but that's only because its in the Pegasus consolation.

** The Metroid home planet is [=SR388=]. Justified as the name is a catalog name given by the Federation. The planet was never colonised by them (due to certain nasty energy-sucking jellyfish-things) and so there's no reason for a proper name. Samus' own home colony is [=K2-L=].

** The very first planet ever visited in the series has the designation Eden Prime, even though no other Eden planets are ever encountered. The name is most likely symbolic. In the Bible, Eden was the first terrestrial human settlement and was a paradise until the humans got kicked out. In the game, Eden Prime was one of the first extra-terrestrial human settlements and was a paradise... [[spoiler:until the geth invaded]]. (This plays on the mathematical notion of "prime", e.g. ''f'(x)'' is the first derivative of ''f(x)'').

* Not uncommon in ''Franchise/TheHitchhikersGuideToTheGalaxy'', sometimes using Greek or Roman letters instead of numbers, for variety. Several planets did have actual names, however: Earth ("What a boring name..."), Magrathea, Golgafrincham, [[strike:Persephone]] Rupert...

* ''ComicBook/LesMondesDAldebaran'' is set on Aldebaran IV (also known simply as Aldebaran).

* In ''FanFic/AeonNatumEngel'' Earth is classified as ǶǡѬѮӜ-[(zero-46,656) and (thirtyone-1296) and (eleven-36) and (thirtyfive)]-[(zero-60,466,176) and (one-1,679,616) and (twentynine-46,656) and (seven-1296) and (seventeen-36) and (three)]. Would be considered as a case of Exaggeration if not for beings who are using that numbering system, the Migou.

* The ''FanFic/GoldenAge'' series has planets Excelsis-One through Five.

* In one of the ''Literature/SoulDrinkers'' novels, an [[TabletopGame/{{Warhammer 40000}} Adeptus Mechanicus]] world is referred to solely by a "serial number"-type name. Of course, given the nature of that particular branch of the Imperial hierarchy, that's about par for the course.

* ''TabletopGame/{{Warhammer 40000}}'' uses names like Lorne V and Kaurava IV on top of more standard titles. But they also tend to name a star system after its most important planet, a subsector after its most important system...

* ''VideoGame/SystemShock 2'' is set around Tau Ceti V.

* ''Videogame/EliteDangerous'', all but a handful of the billions of stars are numbered (either randomly generated, or pulled from a astronomical catalog), giving us beautiful names like "Eol Prou RS-T D3-94". Planets share the name of the star they orbit, and are assigned an alphanumeric code based on their orbit. Only a handful of planets or stars have an actual name; some are from previous games or are actually named in real life (such as "Sirius"), and a handful were named by kickstarter backers such as the infamous "Stapled Peacock Flesh", a terraformed Earth-like world.