Lucid Dreams is core RPG system. It uses a d10 pool system geared toward the darker, grittier, aspects of role-playing; handling anything from Stone Age to near-future settings. Popular settings such as the world of H.P. Lovecraft will port easily into this game system. There are no character levels or monetary rewards to accumulate. Accomplishments, finding clues, moving the story forward, and surviving are the rewards.
Also, check out the game review by blogger Ernie Laurence Multiverse Review.