On Rifts or Savage Worlds
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What is Rifts
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Savage Worlds Quickstart Rules, this is a PDF basics on the rules.
* the PDF are on drive through here
Savage Worlds Rifts PDFs
* The wiki has a good run down of what each book is
Savage World Rifts Wiki
So that the setting for Rifts, a post-post-apocalyptic kitchen sink setting where you can literally find just about anything and ditch the terrible rules for Savage Worlds instead
The basic characters in the game, not including the characters listed above are...
* Combat Cyborg - you have pretty much replaced everything but your brain for a big heavily armored combat cyborg body.
* Crazy - you have the MOM implants (Mind over Matter) in your skull. These implants grant you crazy super-human abilities and minor psychic powers but they slowly drive you more and more insane.
* Glitter Boy - one of the most powerful power armored suits in existence with a gun that turns most targets to mush. Of course you stick out like a sore thumb because your armor really does glitter (to help it better reflect laser attacks)
* Juicer - you have a chemical harness that grants you super human abilities and speed. Its also killing you and you have a best a few fast years to live.
* MARS (Mercenaries, Adventures, Rogues and Scholars) - you are not as powerful as most of the other types but you have lot of variate and extra experience to make up for it. Some examples include Medics, Cyber-Docs, Rogue Scholars, Wilderness Scouts, Mercs, Headhunters (think a cybered bounty hunter but not full conversion like a combat cyborg), Wilderness Scouts and Vagabonds
* Burster - pyrotechnic fire starters on the super scale.
* Mind Melter - master psychics with a lot of variety.
* Lay-Line Walker - this worlds version of a wizard.
* Mystic - combines psychic powers and arcane wizard like powers. They also act something like priests and holy men/women who fight against evil.
There are also a number of non-Human races include most fantasy one (Elves, Dwarves, etc.) but also Dog Boy (genetically created servant race for the Coalition, many whom have escaped), Altara (blind warrior women created by another evil supernatural race), D'nora (devil men like beings who are generally peaceful and inclined to magic), Fennodi (peaceful psionic aliens called 'Quiet Walkers), Grachle Tooth (big not peaceful aliens who like action), Lyn-Srial (honorable winged race), Psi-Stalkers (mutant humans who hunt and feed on magical and psychic energy too live), Quick Flex (aliens who can't seem to sit still and are naturally fast), Simvan (also called Monster Riders, cannibal psychic savages who bond with animals and big beast), and Trimadore (big techno-savants who are mostly peaceful).
There is more depending on how familiar you are with the setting and/or savage worlds