Spelljammer (released on November 1, 1989) is an Advanced Dungeons & Dragons setting that adds up to D&D in SPACE. It has a small but loyal following. Created during a dark era of Executive Meddling (see the Trivia page for details), it was an attempt to cash in on the popularity of the Standard Sci Fi Setting in a fantasy RPG.
The premise of the setting is to link each of D&D's then-popular campaign settings together by means of the old Ptolemaic view of the cosmos; the worlds of Greyhawk, Dragonlance, and the Forgotten Realms were (along with thousands of other worlds) stated to be contained in their own "crystal spheres", massive hollow balls large enough to each contain a whole solar system. Some were heliocentric systems, sometimes geocentric, and some were flat worlds set upon the backs of great tortoises or other "starbeasts". Or something else entirely. The stars you see from your bedroom window are not other suns — they're actually balls of light (or glowing gems) stuck to the interior of your world's crystal sphere. Unless, of course, you're in a sphere that has giant glowing beetles slowly crawling on its inside surface. It happens.
Flying ships, called spelljammers (not to be confused with the Spelljammer, a legendary ship miles in length) traverse wildspace, the void within each sphere, traveling from world to world (which always seem to support life no matter their distance from the sun). The ship picks up an "air envelope" when it leaves the atmosphere, so breathing is limited by the number of crew and the size of the ship, and gravity is always directed toward the deck from both above and below. And outside the crystal spheres (accessible through natural portals or transportation magic), lies the Phlogiston (or "the Flow"), a gaseous, highly incendiary substance that's all the colors of the rainbow and lets your ship travel at warp speed as long as you're in one of its currents.
Spelljammer was utterly preposterous, didn't really care one whit about real-world astronomy or physics, and was completely aware of this. Never taking itself all that seriously, it was one of the few inherently fun games that TSR was permitted to publish in that era. A very brief list of some of the things that you will find in Spelljammer, besides a deliciously crazy mish-mash of everything D&D has to offer: Weird Science, Space Pirates, giant space hamsters, stuffy British elves, and gnomes who think that catapults are a good replacement for staircases.
A parody setting released by the guys who made Hack Master, HackJammer, attempted to fit the setting to a well-tested set of rules that made it more playable, but for many it was too little too late.
A 3rd Edition remake of the setting appeared in an issue of Dungeon Magazine. While thematically identical to the original Spelljammer (although with its own default campaign setting limited to a single system), it removes the Phlogiston/Crystal Spheres to replace them with the vacuum of space and star systems/galaxies, with the notable difference that suns are also portals to the Elemental Plane of Fire with their own atmospheres and natural satellites (apparently magic still outright replaces physics). Additionally, a later issue of Dragon Magazine included 3rd edition versions of popular Spelljammer races. Other than that it was mostly abandoned (no proper products) and left to fans.
Spelljammer received some references in Fourth Edition material: it was one of the settings listed as possible to see print, and some Spelljammer content has made it into the Manual of the Planes (as a ship to sail the Astral Sea and to use to Plane Shift) and Forgotten Realms Campaign Guide (specifically referring to the crystal spheres and phlogiston). Sadly, nothing came of this; as 4e ends there is no Spelljammer in sight (though an Epic Destiny in Heroes of The Elemental Chaos lets you become a Regiar). Mike Mearls said that this wasn't so much due to Spelljammer being too silly but rather how hard to pull off the crossover aspect is. He said that if they were going to do it in D&D Next, it'd be "its own thing"...
Then, during the D&D Direct event on April 2022, Wizards of the Coast announced that the Spelljammer setting will finally return for the game's Fifth Edition with a sourcebook bundle consisting of Astral Adventurer's Guide, Boo's Astral Menagerie, and an adventure module titled Light of Xaryxis, which is set to be released on August 2022.
There's one series of novels (The Cloakmaster Cycle), one short-lived DC comic book series, one gamebook, and one Video Game (Spelljammer: Pirates of Realmspace) using this setting. The dedicated fan portal also tracking usenet groups and keeping mirrors of Spelljammer fan-sites that go down is spelljammer.org.
The setting contains examples of:
- Agent Peacock: The Reigar. Beautiful, androgynous artistes...and if pushed into actual combat then several Hells break loose!
- All Theories Are True: Phlogiston! Crystal spheres!
- Always Chaotic Evil: One of the first major D&D settings to start playing with this, from Nazi elves, to a community of relatively decent illithids, to a non-evil mutant Beholder bartender.
- Amazon Brigade: The Lakshu. These "teeth-gritting, armored harridans" were stupid enough to try to attack the "namby-pamby artistes" that are the Reigar, who promptly subjugated them and reshaped them all to look identical so as to make them into a single work of "art". Now they serve as muscle for their Reigar masters.
- Artificial Gravity: Technically, gravity "carpets" on small objects were a natural phenomenon.
- Artistic License Space: Spelljammer defies actual astronomy so obviously that it can only have possibly been intentional. The stated design intent was to create a game where a medieval knight standing on the prow of a sailing ship currently floating in space would be completely normal.
- Attack of the 50-Foot Whatever: Including breeds like the Subterranean Giant Space Hamster, Sabre-toothed Giant Space Hamster, Rather Wild Giant Space Hamster, Invisible Giant Space Hamster, Sylvan (or Jungle) Giant Space Hamster, Miniature Giant Space Hamster (otherwise known as... a hamster; the breeding came full circle...), Armor Plated Giant Space Hamster, Yellow Musk Giant Space Hamster, Ethereal Giant Space Hamster, Carnivorous Flying Giant Space Hamster, Two-Headed Lernaean Bombardier Giant Space Hamster, Two-Faced Giant Space Lagan Hamster, Fire-breathing Phase Doppleganger Giant Space Hamster, Great Horned Giant Space Hamster, Abominable Giant Space Hamster, Giant Space Hamster of Fear and Flame, Tyrannohamsterus Rex, and the legendary Giant Space Hamster of Ill Omen.
- The Battlestar: Tsunami (Human—Wa), Armada (Elven) and Mammoth (Ogre) are heavily armed carriers of small crafts.
- Bishie Sparkle: The Reigar have this as an inherent part of their physical appearance, to the degree where they have weaponized it.
- Bizarre Alien Biology: Almost anything.
- Even peaceful plants, such as starfly tree — its seeds leave the atmosphere and go Space Sailing until they meet a good icy asteroid. Then a seed roots itself, turns its shell into boiler with steam jets and slowly thrusts the ice boulder it sits on to a warmer orbit where it thaws.
- Boisterous Bruiser: The giffs as a race—big hippo-people with a fetish for firearms. Seriously.
- Canon Immigrant: The Neogi and the Giff both appeared in Mordenkainen's Tome of Foes, a 5th edition source book primarily for the Forgotten Realms and Planescape settings.
- Captain Ersatz:
- The bionoids are basically mass-produced Guyver units, right down to the chest cannon.
- Gammaroids for Gamera, if the name doesn't qualify them as a Shout-Out.
- Word of God confirms the Clockwork Horrors as one for the Daleks, although they have more of a Horde of Alien Locusts aspect to their methodology and look very different.
- Colony Drop: Not typically, but still, it's a possibility.Zelva Twogg, Secretary for Wildspace Affairs, New Waterdeep: If we could find some way to tow that old dwarven citadel into orbit around our world, we'd have a fantastic station from which we could open trade to the other worlds in this sphere. We'd probably do best to contact some adventurers to do the work for us.
Skrund the Bald, Undermarshall for Pan-Goblin Affairs, New Trollmoor: If we could find some way to tow that old dwarven citadel so that it was heading right for New Waterdeep, we'd be rid of those damned humans in an eyeblink. We'd probably do best to contact some pirates or monsters to do the work for us.
- Crossover: Spelljammer crosses over with Dragonlance, the Forgotten Realms, Greyhawk, and it can crossover with Planescape, but the two rarely if ever did because they were both ways for adventurers to visit different worlds. The setting has the potential to crossover with Ravenloft even, as it has been noted that the Mists can appear even in Wildspace, but the two have never really crossed over due to Spelljammer being a much goofier setting than Ravenloft.
- It was specifically stated that players could not reach Athas, the world of Dark Sun, by spelljamming — presumably because it would provide the Athasians a way to escape their Crapsack World or to bring in outside help, either of which would have been thematically at odds with the Dark Sun setting. (Note that you can reach Ravenloft from Athas, because after all, Ravenloft is arguably an even worse place.) This still feels a bit odd, since Dark Sun had by far the most "alien world" vibe of any of the other D&D settings, but then again, it was simple enough for individual DM's to ignore the rule and take their spelljamming campaigns there anyway.
- Crossover Cosmology: Any imaginable cosmology is likely to be implemented in at least one crystal sphere. Somewhere.
- Crown of Power:
- The Crown of the Stars in the boxed set allows the wearer to propel a ship as if they were sitting on a spelljamming helm.
- The Crown of the Void in Lost Ships gives its user their own breathable atmosphere, allowing them to live in the vacuum of space.
- Death from Above: Averted. A flying weapon platform obviously could have an enormous advantage over groundlings, but spelljammers are too clumsy in the atmosphere and thus are sitting ducks for anything that can get them. Spelljammer shock—which can be caused by any sort of damage—and failure to replace the helmsman in free fall before hitting the ground means Total Party Kill. Did we mention helms are expensive?
- An example: "The Three Greenwings Wars". IEF sent Monarch Mordent to aid the defenders of Myth Drannor. It helped a lot, but as the name implies, emerged in one piece from only two battles. The third time man-o-war descended to have a good shot, one nycaloth flies up and starts chopping a wing with great axe, simply ignoring most of the stuff elves can quickly hurl at him without breaking their own ship. The wing falls off, spelljammer shock kills their helmsman, the ship crashes.
- Earth-Shattering Kaboom: The Master Stroke, which was the Reigar's grand attempt to achieve the ultimate artistic expression of war — by blowing up their own home planet! It's not an accident that most sane people try to avoid these guys.
- Elemental RockPaperScissors: The distribution of Fire (suns) and Earth (planets) especially, determined the structure of a system, and the fact that Air tended to "stick" to objects and people made interplanetary and inter-sphere travel possible.
- The Empire: The campaign-length adventure Under the Dark Fist introduced the Vodoni Empire, a totalitarian and expansionist human empire that controlled no less than twelve solar systems.
- The Emperor: Vulkaran the Dark, overlord of the Vodoni Empire.
- Everything's Better with Penguins: Spelljammer has the Dohwar, a race of telepathic, merchant penguins in SPACE, who ride flying pigs, wear swords on their beaks, and get drunk by eating apples.
- Expy: Some of the races are recycled from the aliens in TSR's earlier sci-fi RPG, Star Frontiers. Rastipedes are based on Star Frontiers's vrusk, hadozee are yazirians, syllix are sathar, and plasmoids are dralasites.
- Fantastic Racism: Not much, given the Loads and Loads of Races in the setting, but still.
- There's human organization Xenos, guys who hate all other races.
- Elven Imperial Navy are generally benign, but are haughty enough to annoy everyone else (Sindiath Line's readiness to receive less belligerent elves upkeeps this status quo). After which they are loudly aggrieved that it was Unhuman War. They have an especial hatred for goblinoids.
- The branch on the Spelljammer is outright genocidal — planning to engage in a war of extermination against all goblinoids that is not portrayed favorably just because they're evil — but is fortunately prevented from actually acting on it by, well, being on the Spelljammer.
- Normal gnomes tend to think that tinker gnomes make the whole race look like clowns; a few of them even go so far as to hunt down tinker gnomes' "ships" to wipe this dishonour off the space lanes. It's not that tinker gnomes weren't generally nice guys, but since minoi mashup machines are plain dangerous for any settlements they may try to land at, those who break them up before they fall on people's heads are at least as likely to be approved as condemned.
- Beholders always run on this trope, but here they can engage in their pointless race wars in full view of everyone else with entire fleets going at it.
- The Spelljammer includes, amongst its assorted races and factions, a tower populated by the Shou, an Oriental human culture from Kara-tur who regard everyone who isn't a Shou as a simple-minded, barbaric gaijin. They're led by a mad magistrate who believes he is the captain of the Spelljammer and has total control over life and death over everyone (he doesn't, not outside the Shou tower, anyway), while his aide, who really runs things, is a secret member of the branch of the abovementioned Xenos and is planning on getting them to wipe out all non-humans so that the Shou can then conquer/eradicate the non-Shou humans.
- Fantasy Aliens: These are a major feature of the setting, in the form of both original species found wandering in magic starships through the pseudo-ptolemaic universe and traditional fantasy races who went up and joined them.
- Fantasy Kitchen Sink: And admits this (and encourages in others):...the writer once described his own campaign as a "cosmic vacuum cleaner, sucking up every fantasy idea that crossed its path."
- Forgotten Super Weapon: Second Unhuman War has elements of the Forgotten Super Arms Race, so to speak.
- Good-Guy Bar: The World Serpent Inn mentioned in several sourcebooks was built in its own demiplane by an archmage from Toril, an Arcane and an Illithid as a neutral ground when Sigil turned out to be too violent and inconvenient for quiet business and rest. Not only is it connected to many worlds, but is accessible to powers, and some gods visit it to relax and chat with creatures they deem interesting. It's a Good-Guy Bar since no one wants to annoy peacefully grazing deities, and some clients in a common room can turn out to be gods on a tea-break. And even if there aren't any, The Bartender is an avatar himself — if some god just likes to meet new people and thinks it's funny, why not?
- Grey-and-Gray Morality: Scro vs. IEN frequently approaches this. Scro are Lawful Evil but honorable in their own way and elves are theoretically Good Guys, but they're official jerks who frequently poke into other people's business. Both think that a piratical attack on a neutral party is perfectly acceptable if there's a little chance to get the strategical advantage from it. In the Cloakmaster Cycle some IEN guys even topped it with a random murder just to show they're serious about it. While acting offended that others weren't too eager to join their side in the First Unhuman War, no less. Both try to control all the wildspace as they see fit; and as far as other races are concerned, neither the idea of bloodthirsty scro collecting tribute nor excitable haughty elves snooping around makes for a particularly ideal situation.
- Hamster-Wheel Power: Gnomish technology is often powered by giant space hamsters running in wheels.
- Honest John's Dealership: Rastipede. They are also eager to take an advantage of a client's gullibility while sticking with the letter of bargain only. Arcane are even greater traders, but they are reliable... though not above using rastipede go-betweens while knowing their habits.
- Human Resources: The infamous Death Helms or Lifejammers operate by using the life force of a victim strapped into it to power the ship. They're a favorite of neogi and other evil spacefarers.
- Humongous Mecha: Elven Spirit Warriors, giant undead artificially-grown insect bodies controlled by a pilot in the torso.
- Living Ship: Although, technically, this was supposed to refer almost exclusively to the Spelljammer itself, it is applicable in a much less interesting fashion to the Elven vessels, which are shaped from a living spacefaring plant. Reigar Esthetics are more potentially dangerous as a lifeform, though just as mindless. Borderline cases are Tick — Neogi vehicle powered by life draining, designed to be used as a "saddle" for something big. And some people just live on the backs of kindori — they are big enough for a village and travel in herds.
- Lotus-Eater Machine: The Spelljammer, in a sense. Part of its protective elements is that it fills the air envelope it produces with arcane pheromones that subtly enchant those who set foot aboard it and inhale its air. The charm leaves their thought processes, nature, etc, fundamentally unaltered, but engenders a complete lack of a desire to leave the Spelljammer and a protectiveness that prompts them to fight off attackers or otherwise see to serious threats to the ship. Once removed from the Spelljammer's air envelope, this effect wears off in 2-12 hours. Of course, first you have to get them off, which is the tricky part.
- MacGuffin Title: While a "spelljammer" is a genetic name for a ship(among other things), the setting is named after the Spelljammer, a legendary, sentient ship that everyone in the setting dreams of finding and commanding. Whoever succeeds will gain unimaginable power.
- MacGyvering: Nearly everything ever made by tinker gnomes.
- Mad Artist: The Reigar. Every last one. Legend says that they destroyed their homeworld due to their obsession with art. Add a spoon of Mad Scientist and two drops of Parody Sue, shake until it tastes great and mildly scary.
- Mad Doctor: meets Be Careful What You Wish For in the Xixchil. An ideal choice to acquaint all munchkins in range with, and see what sort of Hilarity Ensues.
- Made of Phlebotinum: This setting as a whole.
- Magitek: Crops up here and there, with the likes of Autognomes (whose malfunctions can be either hilarious or horrifying), and Clockwork Horrors, a race of mechanical spider-like robots that can strip a world of all life over a couple centuries.
- Massive Multiplayer Crossover
- Massive Race Selection: That's a lot of people collected from most D&D settings and then some more.Gaeadrelle Goldring, half-kender on the Rock of Bral: I used to think that a lizard was a lizard, you know, but then I saw that there were as many types of them as there are of people like us. I met some trogs once, not very friendly ones at that, and, wow, did they ever stink. It was incredible. Then I met dracons, saurials, sithp'k, and, of course, the wasag, like that little blue guy over there.
- The Multiverse: The characters travel between Crystal Spheres, each containing a solar system or some variant thereof. Basically, every non-scientific legend of what the stars and planets are wind up being literally true in at least one crystal sphere. Additionally, Spelljammer took place within the greater multiverse featured in Planescape.
- Ninja Pirate Zombie Robot: Lots of. See also the footnote on Giant Space Hamsters above.
- One-Word Title: Also a Portmantitle because it's a compound word. MacGuffin Title.
- Organic Technology: Several, elves are best known, as the creators of Bionoids and transport modifications of starfly plant (gadabout, flitter/man-o-war/armada). Reigar at least made their Esthetics and changed Lakshu to their current form. Goblinoid races once made Witchlight Marauders.
- Our Dwarves Are All the Same: They live in giant stone space stations sculpted to look like bearded faces, but otherwise, still the same.
- Our Elves Are Different: The Imperial Elven Navy was a vast but loose empire of elves made up of almost every known subrace from many D&D settings. The IEN was a sovereign entity with its own leadership, but it kept groundling elf nations in touch with each other. The Spacefaring Elves had the unpleasant characteristics of their landbound cousins turned Up to Eleven. They were haughty, aloof, snobbish and though of everyone else as semi-civilized smelly yokels. They were supposed to play the role that the Spanish/British Navy do play in swashbuckling fiction.Rozloom: Please, Captain, you see before you a man in great danger.
Rozloom: This one calls you "sir". An elf shows you respect? If you are not great captain, you must be small god.
- Our Gnomes Are Weirder: Hoo boy are they.
- Our Monsters Are Different:
- There were whole new manuals about D&D species adapted to "Wildspace", and a few unique to the setting.
- Mindflayers and Beholders, already moderately popular in normal settings, were elevated to new heights of villanous complexity, while the Neogi, a cross between a moray eel and a goat-sized tarantula were introduced to serve as reavers and slave traders.
- Poison Is Corrosive: Supplement Greyspace. The horg secrete a corrosive, poisonous liquid from their teeth and claws. Any creature they bite or claw takes up to 20 Hit Points of damage per minute for 10 minutes.
- Portmantitle: Also a MacGuffin Title-type One-Word Title.
- Powered by a Forsaken Child: Death Helms or Lifejammers tap the life force of living beings to power vessels. Employed by Neogi and other evil spacefaring races.
- Proud Merchant Race: The Arcane are the pre-eminent example of this in the setting, as their entire culture revolves around trading. Downplayed with the Rastipedes, who definitely have a reputation as shrewd-bargaining, less than moral merchants, but also do other things. Zigzagged with the Dohwar, who want to be this... but are absolutely terrible at it.
- Roguish Romani: The Aperusa are usually in roles of harmless entertainers, salvage scavengers, petty thieves or scammers, or at most not-too-brave Lovable Rogue. They even travel on unarmed (and patchwork) ships. On the exotic side, they're slightly magic-resistant and immune to mind-reading, but can't have Psychic Powers. They also have an extremely misogynistic culture; men are the brains and the brawns while women do all the work and make babies, men get first pick at the loot, a widower can remarry but a widow must stay chaste, etc, and the menfolk in particular love to take advantage of non-Aperusa women who are foolish enough to fall for stories of the romanticism of the Aperusa lifestyle.
- Rube Goldberg Device: Nearly everything ever made by tinker gnomes.
- Rule of Cool: This trumps science every time. Though consistency beats it.
- Say What? There IS a planet full of giant lizards which are treated as the Tarrasque. EVERY. ONE. OF. THEM. And did I mention said planet is full of them?
- The good news is that they're completely docile lithovores... as long as they stay on that planet. It's suggested that the more familiar versions of the Tarrasque are what happen when they're relocated to other worlds, with atmospheres that don't keep them from going homicidally insane.
- Say What? There IS a planet full of giant lizards which are treated as the Tarrasque. EVERY. ONE. OF. THEM. And did I mention said planet is full of them?
- Sapient Ship: "the Spelljammer". It also spawns little cute Smalljammers — unarmed, but very agile living boats capable of empathic contact and magical mimicry.
- Sdrawkcab Name: Scro.
- Short-Range Shotgun: Jettisons, special anti-personnel weapons that fire slow clouds of debris. A good thing to use on pursuers ready for boarding, but useless in long range combat.
Sergeant-Major Orsin "Apocalypse" Themus,
- Dolphin◊: the ship with a detachable shuttle on top of an extended curved "neck"? Hmm, what this strange construction could resemble?.
- The Rock of Bral is named due to the Rock of Gibaltrar ("the Rock of Bral (whose origins are the Rock of Gibraltar again, I will take the blame for that one)." -http://grubbstreet.blogspot.com/2011/02/spelljamming-innnn-spppaaaaaace.html
- From The Complete Spacefarer's Handbook comes this reference:"I love the bitter stink of smokepowder in the morning. It smells like... victory."
716th Marine Regiment, Realmspace
Second Unhuman War
- Shrouded in Myth: The Spelljammer itself.
- Space Fighter: The main limitation on such tactics is the cost of power sources for every warboat, thus Wa churn out rudders of propulsion for Locusts, elven Flitters are built upon starfly wings and goblinoid Blades use relatively cheap Death Helms (a.k.a. lifejammers).
- Space Is an Ocean: With ships, barnacles, and, well...
- Space Orcs: The scro — although bloodthirsty, xenophobic, and all-around unpleasant — are quite intelligent and disciplined (even honorable after a fashion), and verge on being "Blizzard orcs". They were the result of goblinkind races being almost totally expunged from the spelljamming space by the Elven Armadas and hence recurring to strict discipline and regimentation to make a comeback — Roaring Rampage of Revenge, literally. Some of them learned to speak Elvish well just so they could properly tell the elves who was killing them. The comeback of the Scro formed the centerpiece of early editions of Spelljammer, with adventures including death star-like Scro stations which looked like Gamera and the "good" races of the setting having to put aside differences to fight the common threat.
- Space Pirates: Naturally. One variety is the "Pirates of Gith", who use hit-and-run tactics including temporarily shifting to another plane of existence.
- Space Sailing: The various spelljamming ships in this setting tend to be modeled fairly closely after ocean-going ships.
- Space Whale: Not to mention space dolphins and space sharks and an echinoderm or whatever those Esthetics are. And the eponymous Space Manta Ray.
- SpaceX: Many variant monsters. The best known would likely be "giant space hamster" thanks to the nod in Baldur's Gate.
- Tree Vessel: Space vessels created by elves in the setting are grown, not built, from living, leafy trees.
- Unit Confusion: More than a whole army of umber hulks could make. Those "space tons", dagnabbit. In one sourcebook a mass of 1 ton allows an atmosphere of 100 cu.yd. of air, in another it means body's own displacement of 100 cu.yd., so...
- Viral Transformation: Aside of the usual (the undead): Bionoid, an artifical shapeshifting Person of Mass Destruction can also be created by infection, as some eggs are still stashed here and there. Did we already mentioned that elves are nice guys?
- The Wall Around the World: Crystal shells.
- Weapon of Mass Destruction: Witchlight Marauders—a weaponized artifical Horde of Alien Locusts whose only purpose in their life is to eradicate all biomass on a world and die, in preperation for terraforming a world by an invading race. Using them is generally considered a Moral Event Horizon.
- There are mentions of beholders building a giantic weapon resembling an eye the size of a small moon. This eye was capable of destroying entire worlds...
- Weird Science: The gnomes! Who happen to be a branch of the tinker gnomes from Dragonlance who found a way into space but never found a way back down...
- What Measure Is a Non-Human?: Most humans—except Xenos, the club for rabid xenophobes—resigned such worries facing Loads and Loads of Races. Usually it's "What Measure Is A Non Elf": not only they remained true to their habits, but the strong fleet allows them to feel superior (and be asses about this) even more than usual.bionoid: Because we are living beings and not intelligent, undead weapons, the elves consider us a mistake. Elves, as a rule, prefer not to acknowledge their mistakes.
- A Wizard Did It: The setting runs on this trope. As one source book put it, "It's magic, and it knows it's magic."
- World Shapes: All and any. Mostly, planets in solar systems, but even these got tons of quirks.
The specific stories and accessories contain the following:
- Clingy Macguffin: The Cloak that Teldin Moore gets at the beginning of The Cloakmaster Cycle.
- Cool Horse: Comet steeds. A timid herbivore (after all, they would need to fight only something they can't outrun). Rather smart—for a horse. Trails sparkles. Fast enough to make interplanetary travel practicable (only 1 point below Ol' Manta herself).
- Earth-Shattering Kaboom: In the First Unhuman War at least one planet was blasted into asteroid cluster. By elves, of course (the Shattering of Borka). The Reigar blew up their homeworld in some sort of performance.
- Farm Boy: Teldin Moore, well, he is not exactly a boy anymore, being in his early thirties when the first book begins, but he still fits the trope.
- Giant Footprint Reveal: That big lake on the map in Herdspace... "Looks like something stepped there, doesn't it?".
- Half-Human Hybrid: And not just any, but a half-kender.
- Hollow World: Herdspace, described in The Maelstrom's Eye by Roger E. Moore got an inhabitable landscape on its internal surface. Oh, it's rather small... for a crystal sphere.
- I'm Dying, Please Take My MacGuffin: The Cloakmaster Cycle starts this way.
- Magnetic Plot Device: an Ultimate Helm.
- That's the magic item that lets you control the Spelljammer, for those of you who don't know.
- My Species Doth Protest Too Much: The Cloakmaster Cycle and at least one Source Book has one honorable and even rather nice... mindflayer.
- Obvious Beta: Spelljammer: Pirates of Realmspace wasn't too buggy, but has a great deal of stuff obviously cut short with an axe.