The Dungeons & Dragons multiverse is a vast patchwork of worlds and planes. Some campaign settings make interplanar travel part of everyday adventuring, while others encourage you to stay grounded. This guide compares three evergreen options for tabletop play-Planescape, Spelljammer and Eberron-with an eye toward playstyle, complexity and session prep. Along the way, you’ll find links to similar posts on this site and a free steampunk primer for those who like interworld intrigue with grit.
Why the Multiverse?
In 2025 the D&D multiverse is no longer just a footnote in rulebooks-it’s a marketing focus. Wizards of the Coast is emphasising world-hopping adventures in livestreams and product announcements. Planescape: Adventures in the Multiverse, Monsters of the Multiverse and Journeys Through the Radiant Citadel are all recent releases that knit together D&D worlds. The company promises even more multiverse-spanning books and campaigns.
This guide compares three evergreen settings-Planescape, Spelljammer and Eberron-for running world-hopping games in 2025. We’ll also link to Ave Molech, the self-published steampunk RPG that inspired this site. When you run a multiverse-friendly game, portals and spelljamming helms become hooks for adventures rather than just escape valves. You’ll need to explain how travel works, decide which factions shape each world and ensure your players have reasons to leave home.
Planescape: portals, factions and the Outlands
The 2024 Planescape: Adventures in the Multiverse slipcase consists of a setting book, a monster compendium and an adventure. The setting focuses on Sigil, the city of doors, and the Outlands, a neutral territory connecting every outer plane. The book doesn’t provide a full guide to the inner and outer planes, so Dungeon Masters (DMs) will need to supplement with earlier material or the core Dungeon Master’s Guide.
- Playstyle – Sigil plays like a Star-Wars-cantina meets political thriller. Faction politics, weird planar denizens and whimsical “cantina” moments can all appear, depending on your tone. Portals are everywhere; some require keys or passwords, so PC ingenuity is rewarded. However, powerful spells such as teleportation can undermine travel if you don’t clarify how they interact with Sigil’s portals.
- Complexity – Because the setting book focuses mainly on Sigil and the Outlands, you’ll need to prep planar details yourself. Players may also try to bypass whole adventures with spells or by returning to Sigil. Strong hooks are essential.
- Session prep – Choose which factions matter, decide how portals function and prepare a few Outlands gate-towns. Don’t be afraid to simplify the cosmology for new players.
For steampunk-flavoured planar intrigue, check out the Ave Molech primer on this site; it’s a d20 setting where magic powers airships and marsh adventures. Its emphasis on tieflings and airship travel meshes perfectly with Planescape’s factional politics.
Spelljammer: Wildspace and the Astral Sea
Spelljammer brings D&D into space. Adventurers travel through the Astral Sea, a plane where travellers don’t need food, water or air and move by willpower. Entire planetary systems float within Wildspace pockets inside the Astral Sea. Ships carry air envelopes that slowly degrade-fresh air becomes foul and eventually deadly-introducing resource-management tension. A spelljamming helm (a rare magic item that only spellcasters can attune) propels the vessel; ships zip through Wildspace at “100 million miles in 24 hours” but slow to a crawl in atmospheres.
- Playstyle – Expect swashbuckling naval combat among floating corpses of gods, fortresses and asteroids. Gravity planes on ships let crew fight on both decks. Critics note that the 2022 Spelljammer set provides little lore or space-combat guidance, so you’ll be doing some of the design work yourself. The setting is still high fantasy with swords and sorcery; players may battle space dragons, giant hamsters and steampunk galleons, crossing from Forgotten Realms to Greyhawk.
- Complexity – Managing air quality and gravity adds crunchy logistics. Spelljamming helms should feel rare and special to maintain tension. Because the official set omits detailed ship-to-ship combat rules, many groups homebrew mechanics or borrow from other systems.
- Session prep – Design your own Wildspace systems, decide how accessible helms are and prepare consequences for running out of fresh air. If you want to link Spelljammer to other settings, scatter portals or astral conduits that dump the party into Planescape or Eberron.
Eberron: pulp adventure and manifest zones
Eberron: Rising from the Last War turns magic into everyday technology; bound elementals power lightning rail trains, elemental galleons and rare airships; sending stones serve as telegraphs; banks use extradimensional vaults and magical lanterns light cities. This pervasive low-level magic makes Eberron feel more like late Victorian tech than high fantasy. The setting emphasises pulp adventure and noir intrigue, with urban crime families, nationalist tensions and newspapers reporting on adventurers.
Eberron’s planes are tethered to the world by manifest zones-places where the walls between planes are thin. Zones range from wide regions to a single well and influence the environment; some act as gateways. Planar alignment also ebbs and flows: at certain times, the plane of Syrania might be coterminous, allowing new portals, whereas at other times it recedes. The aftermath of the Last War ensures that nations are wary and secrets run deep.
- Playstyle – Eberron excels at pulp heists and noir mysteries. Because magic feels like steampunk technology, even low-level PCs can ride lightning rails or board airships. Manifest zones add planar flavour without forcing you to learn the entire cosmology; a single gate or planar influence can shape an adventure.
- Complexity – You’ll need to juggle intrigue, political factions and the ethics of arcane technology. The setting offers new races (warforged constructs, shifters, changelings and kalashtar) and dragonmarked houses with economic monopolies. Planar travel is limited compared to Planescape or Spelljammer; crossing to other worlds usually involves manifest zones or rare artifacts.
- Session prep – Develop a home base (Sharn, the Mournland or Khorvaire), choose a few manifest zones and decide how the Last War’s scars affect NPCs. Steal noir tropes-think shady barons, double crosses and missing persons-and sprinkle in planar oddities to remind players they’re in the multiverse.
Comparing the settings
| Setting | Multiverse travel & playstyle | Complexity & prep |
|---|---|---|
| Planescape | Sigil’s portals connect every outer plane; factions and politics range from serious to whimsical. | Requires external references for planes; decide how portals interact with spells and create hooks. |
| Spelljammer | Wildspace voyages with air envelopes and gravity planes; adventure among astral debris and space creatures. | Manage air supply and helm rarity; homebrew ship combat. |
| Eberron | Pulp/noir stories powered by arcane technology; planar influence via manifest zones. | Prep intrigue and politics; choose zones; handle unique races and dragonmarks. |
Similar posts on this site
- Ave Molech – This d20 setting turns magic into steampunk tech with tieflings and airships. It’s the perfect companion for Planescape fans who crave gritty planar intrigue.
Final thoughts & CTA
Choosing a multiverse-friendly setting comes down to taste. Planescape offers baroque portals and ideology wars. Spelljammer trades spells for starships and requires some DIY rules. Eberron lets you blend pulp noir with arcane technology and dip into other planes via manifest zones. Each setting demands prep, but the payoff is a campaign that feels larger than life.
If your group enjoys interworld intrigue with steampunk grit, check out Ave Molech, the RPG this site’s author self-published in 2006. It offers airships, tieflings and marshland mysteries that mesh perfectly with 2025’s multiverse trend.