Spacebase DF-9 is now available for Steam Early Access, announces Steam News, saying Windows, OS X, and Linux gamers can purchase access to Double Fine's upcoming sci-fi construction game and help influence its development going forward. Here's the quick pitch on the game:

In Spacebase DF-9, you'll build a home among the stars for a motley population of humans and aliens as they go about their daily lives. Mine asteroids, discover derelicts, and deal with the tribulations of galactic resettlement in Earth's distant future. Meteor impacts! Explosive decompression! Unbearable loneliness!