Science Fiction roleplaying games usually focus on the future, and usually use technology as the source of wonder, where a Fantasy game would use magic. Aliens, spaceships, psionics, laser blasts, and other planets all have their place here, though not all games will use all of these. The first Science Fiction roleplaying game (the first roleplaying game at all that was not a medieval fantasy) was GDW's Traveller.
2300 AD
2300 AD (originally Traveller: 2300) is a "hard science" game of exploration and warfare set among the space colonies of the 24th Century.
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Alternity
Published by Wizards of the Coast, the Alternity system is adaptable to a variety of science fiction genres.
Dark Matter,
Star Drive,
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Babylon Project, The
A science fiction game published in 1997 by Chameleon Eclectic Entertainment, and based on the television series Babylon 5.
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Battlelords of the 23rd Century
Science fiction game published by SSDC, wherein players assume the role of mercenaries hired by megacorporations to fight alien threats.
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Blue Planet
Published by Biohazard Games in 1997, Blue Planet is a dark science fiction game set on the aquatic planet Poseidon in A.D.
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Continuum
Science fiction game about time-traveling "spanners", published by Aetherco.This category does not list sites related to Subspace Continuum.
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Cyberpunk 2020
Cyberpunk 2020, The Roleplaying Game of the Dark Future, is the first and most successful cyberpunk-genre roleplaying game, originally published by R.
Archives,
Campaigns,
CyberGeneration,
Web Rings,
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deadEarth
Post-apocalyptic game published by Anarchy inK, portraying the rebuilding of civilization after a 21st-century nuclear war.
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Fading Suns
Fading Suns is a futuristic / medieval setting where the three main powers of the Nobility, the Church, and the Merchant League struggle against each other and outside forces.
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Free Systems
Non-commercial tabletop roleplaying games based in science fiction (defined for these purposes as rules or settings that use science and technology as central themes, rather than the mysticism that defines the Fantasy and Horror categories.
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Gamma World
TSR's post-apocalyptic science fantasy, set in a 24th Century world populated by insane robots, intelligent animals, and freakish mutants.
Alternity,
Classic,
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Hol, Human Occupied Landfill
Dirt Merchant Games' "adult" comedic science fiction roleplaying game set on Hol, the combination garbage dump and prison planet of the galaxy-spanning Confederation of Worlds.
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Matrix, The
This category is for sites about traditional role-playing games based in the world of the Matrix series, which includes a trilogy of films, nine anime episodes, and two computer games.
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Mechwarrior
A science-fiction roleplaying game set in FASA's BattleTech universe.
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Morrow Project
Post-apocalyptic system published in 1980 by Timeline, Ltd. The eponymous Morrow Project is a secret group of cryogenically-frozen 20th-century scientists and soldiers revived after a nuclear war to rebuild American civilization.
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Orbit
Science-fiction roleplaying game published by 6-0 Games.
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Paranoia
West End Games' post-apocalyptic role-playing game of dark humor, Paranoia features a Big Brother-esque computer, mutants, secret societies, and high character mortality rates.
Paranoia XP,
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Reich Star
Reich Star is an out-of-print science fiction roleplaying game published by Creative Encounters. The game takes place in an alternate future in which the Axis powers won World War II.
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Robotech
Palladium Books' combat-heavy system based on the animated series of the same name.
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Shadowrun
Shadowrun is a near-future roleplaying game, set in the sixth age of humanity, when mankind has mutated and magic has returned to the earth.
Archives,
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Skyrealms of Jorune
Skyrealms of Jorune is a role playing game set in a unique alien world. Originally sold in the 1980s and currently out of active print, the game continues to have a dedicated following worldwide.
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SLA Industries
Nightfall Games' system of "futuristic urban horror". Player characters are operatives of the eponymous SLA Industries, a galaxy-ruling megacorporation run by the immortal Mr.
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Spacemaster
Iron Crown Enterprises' 1985 science-fiction game based on its Rolemaster system. Originally titled Space Master, the game has most recently been re-released as Spacemaster: Privateers.
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Space 1889
Developed by Frank Chadwick and originally published by Game Designers' Workshop, this game inspired by Victorian science fiction game is currently published by Heliograph, Inc.
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Space Opera
Designed by by Edward E. Simbalist, A. Mark Ratner, and Phil McGregor, this science-fiction system was published by Fantasy Games Unlimited in 1981.
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Star Frontiers
Star Frontiers was a science-fiction roleplaying game published by TSR, Inc. in the 1980s. It is currently out of print.
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Star Trek
Beginning in 1998, Last Unicorn Games (a subsidiary of Wizards of the Coast) actually produced four related games based on the famous science-fiction television series: Star Trek: The Next Generation, Star Trek: Deep Space Nine, Star Trek: The Original Series, and Star Trek: The Expanded Universe.
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Star Wars
Roleplaying in the World of Star Wars.
Classic,
d20 System,
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Systems Failure
In this unusual science fiction game published by Palladium Books, player characters are Y2K survivalists who must band together to save America from insectoid aliens who invaded the Earth on January 1, 2000.
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TimeLords
A science-fiction game of time-travelers published by Blacksburg Tactical Research Center.
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Traveller
The first, largest and best Science Fiction Role Playing Game: Traveller. See milieu non-specific sites here, or click on your favorite version to see specialized sites.
Alternate Milieu and Rules,
Campaign Support,
Classic Traveller,
Fourth Edition,
GURPS Traveller,
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Trinity Universe
Science fiction game published by White Wolf Publishing (sharing many basic Storyteller mechanics with the World of Darkness games) set in a 22nd-century world under assault from the Aberrants, vengeful descendents of superhumans exiled from the planet a century earlier.
Aberrant,
Adventure,
Trinity,
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Twilight 2000
Near-future game produced by Game Designers' Workshop (GDW) in 1984, Twilight: 2000 portrays the adventures of American soldiers stranded in Europe after World War III.
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