The Shadow of Yesterday

From the game's homepage:

The Shadow of Yesterday is pulpy romantic sword-and-sorcery at the end of one world and the beginning of the next. This game melds the best of standard fantasy role-playing and a hard-charging narrative engine.

Set in a post-apocalyptic fantasy world where the creation of a moon has ravaged cultures and thrown the fate of the earth into question, TSOY is like a Weird Tales contribution written by Emily Bronte.

Other resources for the game are:

• The game's homepage
• Game rules and background, freely available under a Creative Commons licence
• Additional TSoY material at RandomWiki
• The CRNGames forum on The Forge