Earthdawn is a fantasy RPG originally published by FASA back in 1993.
Red Brick Entertainment have just released the 3rd edition which is the one I picked up. I think it's a great alternative to D&D and boasts some unique game machanics such as "magic Threads" which play an important part in the spell and magic item system.
The basic premise is that Barsaive is a magic rich world and over time that magic drew the attention of fantastically powerful entites from Astral space termed "Horrors", these horrors invaded Barsaive and over the course of four centuries almost decimated the place. To protect themselves the peoples of Barsaive (eight playable races) chose to retreat into fortified dwellings known as Kaers.
PC's emerge from their respective Kaer after the scourge has ended and deal with the remaining horrors and the powwer of the Theran Empire with designs of world domination.
This is, of course, a highly simplified precise of the game, but I find it has a uniquely evocative atmosphere and the ever-present threat of the horrors (which are truely powerful) lends a distinctive edge to the gaming experience.
Having played the first edition I'd highly recommend trying it out.