Arcen Games announces A Valley Without Wind, a procedurally generated action/adventure game in the works for release this year for Windows and OS X. A product section for the game has more details along with some screenshots, and this trailer offers some animations and music. Here's a bit on the game:

AVWW is a complete departure from what Arcen has previously developed in terms of genre. Set in a post-ice-age world in the distant future, the game focuses on survival and exploration. As a random survivor of this harsh world, you decide what impact to make on it. In fact, nearly anything you do will shape your world in some way. Span regions, even continents if you desire. Form settlements and build shelters for safer travel. Map your world, and face its many dangers. Being procedurally-generated [sic], the world is unique for each individual player and it literally goes on forever. No two worlds are the same, and your world permanently forms only as you discover it. Explore, scavenge, craft, cast (yup, there's magic), and fend off foes in a variety of ways. Better your world by aiding other survivors and gaining their help. Or don't, kill everyone in sight and deal with the consequences. It's all up to you.