GURPS Infinite Worlds

''GURPS Infinite Worlds'' is a supplement for the Fourth Edition of the ''GURPS'' role-playing game, published by Steve Jackson Games in 2005 and written by Kenneth Hite, Steve Jackson, and John M. Ford. It expands upon the campaign setting of conflict between the ''Infinity Patrol'', which is the dimension-jumping agency on "our" Earth, referred to as Homeline, and ''Centrum'' across a multiplicity of alternate history Earths. This was presented in the ''Fourth Edition GURPS Basic Set'' (and originated in the Third Edition supplements ''GURPS Time Travel'', '' GURPS Alternate Earths'', and ''GURPS Alternate Earths II'').

Contents

''GURPS Infinite Worlds'' builds on the idea of player characters travelling from one world to another, even across genres, for the fourth edition of ''GURPS''.

''GURPS Infinite Worlds'' has eight chapters: Infinity Unlimited, Enemies Everywhen, Present at the Creation, Worlds Enough, ...And Time, Infinite characters, Infinite Campaigns, and Alternate Infinities.

Infinity Unlimited

This chapter describes one of the two worlds (known locally as Homeline) that have full-fledged, public "parachronics" programs (the technology behind traveling between parallel universes). Travel between worlds is generally done through ground-based equipment ("projectors") or vehicles ("conveyors"), but magic, parahuman abilities and even stranger methods can and have been utilized by both. Alternate worlds (also known as realities or worldlines) are grouped into "quanta", which have varying degrees of ease of access not only to Homeline but to her opponents.

Enemies Everywhen

This is the chapter that describes Homeline's adversaries and hazards. The major adversary is Centrum, the only other reality known to have a public parachronics program, who can be played as a deadly adversary, occasional opponents or grudging allies depending on the GM's preference.

The secondary adversary is Reich-5, the worst of the five known ' Nazis win/survive WWII' realities in the setting. An ill-advised raid by Spetsnaz troops from Homeline Russia resulted in the capture of a troop conveyor, a handful of live prisoners, and the corpse of a scout with a genetically-linked psionic world-jumping ability. A quick-thinking local Brigadeführer made a deal with the mystical SS society of the Ahnenerbe to take possession of the booty (and to keep it all secret from the mainstream Nazi hierarchy); Reich-5 scientists and sorcerers are using occult rituals and horrific medical experiments to slowly spread their Thousand Year Reich to other realities.

Present at the Creation

This chapter describes how to create your own alternate reality and offering inspirational concepts to look at such as the Great Man, Great Moment, and Great Motherland.

Worlds Enough

This is the chapter on some of the alternate worlds in the setting. Reich-5, Caliph, Dixie, Ezcalli, Gernsback, Roma Aeterna, and Shikaku-Mon all appeared in slightly different forms in the older ''Alternate Earths'' volumes.

Armada-2

So named because it is the second world discovered by the Infinity Patrol in which the Spanish Armada was victorious over the English in 1588, Armada-2 is a world just now (in "current year" 1812) emerging from the shadow of Catholic Spanish hegemony, with Sweden, an industrialised Egypt and Huguenot Nouvelle France as other powers.

Attila

A parallel where city-razing Mongol hordes under Genghis Khan destroyed first Beijing and then all the cities of Europe, where now their descendants (in "current year" 2004) rule an entirely nomadic continent. The world was mistakenly named for Attila the Hun by early Infinity Patrol researchers who were confused as to which nomadic leader was responsible for the destruction. Meanwhile, Japan trades across the Pacific Ocean with the urbanized tribes of North and South America, and city-states dot Africa, where steam engines have just been developed.

Azoth-7

When Isaac Newton discovered the secret of the philosopher's stone in 1693, he paved the way for an Alchemical Revolution that has left Azoth-7 dominated by the magical might of Britain, Venice, Prussia, and Spain by "current year" 1780. Notable for having space travel - though whatever Polaris and Sirius may be, they are ''not'' balls of hydrogen tens or hundreds of light-years away from Earth. (The '' Rivers of London'' series is also based on the premise of a magical Isaac Newton)

Bonaparte-4

In Bonaparte-4, Napoleon sacrificed the romance of an Egyptian campaign (which he conducted in 1798 in our timeline) for a stealthy invasion of Ireland, granting him victory over Britain. By "current year" 2024, the world is divided between French, Japanese, Russian, and Brazilian Empires, along with the United States and the Russian Republic, and the world has achieved a stage of technological achievement and social disaffection and tension reminiscent of cyberpunk.

Britannica-3

The success of the rebellion of James, Duke of Monmouth against James II of England in 1685 is the point of divergence between our own world and Britannica-3; wiser and more Protestant rule in Britain meant that tensions with the North American colonies never reached the point of rebellion as they did in real history. Despite the rise of other strong European powers, the world is free of major conflicts, which can be attributed to the strong influence of Centrum in this parallel.

Caliph

In this world the printing press was invented in Baghdad in 796 and was shortly followed by the widespread adoption of the scientific method and an oil-based industrial revolution. The current year here is 1684, but the technological acceleration stemming from these changes has resulted in a society seemingly centuries ahead of Homeline. Unfortunately a burgeoning global war between the tradition-minded major states (Sofala, Persia, Andalus, the Bulgarian Caliphate and the Ummah) and the technocratic Jamahiriya of the western continents threatens the existence of this advanced society.

Campbell

Named for the early death of influential science fiction editor John W. Campbell which occurred in this parallel but not in real history, Campbell is a world notable for the poverty of its scientific advancement. While military applications of scientific research advanced rapidly enough, science as an intellectual pursuit became associated exclusively with death, destruction, and catastrophe (especially after World War II ended with the bombardment of Germany with radioactive dust, killing hundreds of thousands of people). This led to an anti-scientific wave of pacifist Luddism and charismatic religious revival in the 1960s. Lacking the positive fruits of scientific inquiry, the world heads (in "current year" 2004) through ecological disaster and failing economies to a nigh-inevitable showdown between its capitalist and communist societies.

Centrum

The nominal villains of the campaign, Centrum is a totalitarian, homogenized world-state, and the only world other than Homeline to have a major parachronic program. Its point of departure was in 1120, when the ''White Ship'' carrying William the Aetheling, the heir of Henry I of England, did not hit a rock in the English Channel. William's survival precluded The Anarchy and the Hundred Years War, and ultimately the "Anglo-French Empire" became a world-spanning power, with technological progress centuries beyond that of Homeline.

However unbearable tensions existed just below the surface, and in 1902 unknown parties decapitated the ruling house by detonating a nuclear device in London. The resulting succession wars included nuclear and biological weapons, wiped out much of humanity and reduced most of the survivors to preindustrial barbarism. But Terraustralis (Homeline Australia) escaped much of the destruction, and the techno-military cabal known as "The Centrum" that took control there ultimately extended its authority across the globe.

Centrum is a socialist technocratic meritocracy; the government provides all employment and handles the economy, which is bolstered by the massive resources acquired from other worldlines. They believe other worlds should be aiming to follow their example and have a dedicated program of supporting political and economic groups that reflect their own values—stability, meritocracy and an unconscious prejudice against non-English speakers. They view the mix of competing government agencies and private companies from Homeline as dangerously reminiscent of the period prior to their own "Final War".

Centrum Beta

One of the most important parallel Earths from the Infinity Patrol's point of view, Centrum Beta appears to be an exact copy of the home parallel of Centrum - except that the "current year" is only 1895. Understanding Centrum Beta as it is now might give the Infinity Patrol the key to understanding and besting Centrum proper.

Deadly Settings

Also known generally as "Reality Vanish", there are at least 41 parachronic coordinate settings where people or objects sent into them never return. These are assumed to be worlds where the laws of physics are sufficiently different from that of our own universe to kill visitors and/or cripple their equipment (see Rustic under Puzzle Worlds, below).

Dixie-1

In this world, William Walker succeeded in conquering Nicaragua in 1856; during the American Civil War this provided a way around the Union blockade for the Confederacy that ultimately ensured their victory. In revenge for British support of the rebels, the United States invaded and annexed most of Canada; meanwhile the Southrons reintroduced their "peculiar institution" into Central America and the Caribbean at gunpoint. Today ("current year" 1993) the U.S.A. and C.S.A. watch each other warily across an armed border that stretches to the Pacific, while India, the Chinese republics and their neighbors expand their economies at the expense of the moribund European monarchies that never fell after 1918. (See American Civil War alternate histories).

Ezcalli

Here the Columbian Exchange occurred two thousand years early, when a Carthaginian fleet was blown across the Atlantic to discover the New World. This premature contact gave the Native American civilizations time to recover from the shock of new diseases and adopt the newcomers' technology; in addition, the early introduction of maize and the potato to the Old World eventually reduced Rome's ability to control its subjects through Egyptian grain. The Empire ended with Nero, and the patchwork of European successor states were ill-equipped to resist subsequent barbarian invasions. In the "current year" of 1848, the expansionist, steam-powered Tenochca Empire faces off against the Hotinohsavannih League to the north and the Songhay Empire (the last remnant of Roman culture) to the east; whoever wins is likely fated to take on the somnolent but fearsomely large Mongol Khaganate that covers most of Eurasia.

Friedrich

This parallel world is named for the Holy Roman Emperor Friedrich I Barbarossa, who in this timeline managed to be the great imperial unifier and conqueror that the vagaries of fortune prevented him from being in our history. In "current year" 1219, seventeen years after his death, Friedrich is notable for being a hotbed of activity by the SS Raven Division from the Nazi-dominated parallel Reich-5, who seek to turn his Holy Roman Empire into a First Reich and breeding ground for Aryan warriors.

Gallatin

Gallatin is named for Albert Gallatin, the dominant member of Thomas Jefferson's government due to Alexander Hamilton having died in the Battle of Trenton. Without Hamilton to defend and explain the United States Constitution in the '' Federalist Papers'', it was never ratified and the independent colonies balkanized into nine separate republics across the continent by 1860. In "current year" 2004, Gallatin's great powers include Texas (whose nuclear arsenal shields the other libertarian American republics), German-dominated Europaverein, the British Empire, the Soviet Union, and the Japanese Empire; peace is maintained by the fear of mutual destruction in an atomic war.

Gernsback

This parallel world is named after editor Hugo Gernsback, due to the futuristic architecture and technology being used there. The divergence happened in 1893, when Nikola Tesla

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