[b]Numenera: The ninth World[/b] 

"There have been eight previous worlds. You may refer to them as ages, aeons, epochs, or eras, but it’s not wrong to think of each as its own individual world. Each former world stretched across vast millennia of time. Each played host to a race whose civilisations rose to supremacy but eventually died or scattered, disappeared or transcended. During the time that each world flourished, those that ruled it spoke to the stars, re-engineered their physical bodies, and mastered form and essence, all in their own unique ways. Each left behind remnants.

The Ninth World is built on the bones of the previous eight, and in particular the last four. Reach into the dust, and you’ll find that each particle has been worked, manufactured, or grown, and then ground back into drit—a fine, artificial soil—by the relentless power of time. Look to the horizon—is that a mountain, or part of an impossible monument to the forgotten emperor of a lost people? Feel that subtle vibration beneath your feet and know that ancient engines—vast machines the size of kingdoms—still operate in the bowels of the earth."
-Numenera Corebook, chapter 1. 

Numenera is an existing tabletop RP game set far in the future, with an existing lore and RP system. Its incredibly flexible, allowing the players to go from medieval style sword fighting, to fantastical 'nano'(mage) battles, to space travel. There are hundreds of pages of lore that can be provided on google docs to any interested participants, but gameplay will mostly be dictated by the GM, rather than rolls.