From the announcement:
If you haven’t explored the immersive universe of Era: The Consortium, now’s your chance.
Here at Shades of Vengeance, we recently decided to release the game’s Rulebook Primer as a free download.
The game is built with an expansive sci-fi history, and you can drop your characters in any part of The Consortium’s 500-year timeline to experience whatever sci-fi sub-genre suits your fancy.
Space exploration? Post-apocalyptic dystopia? Intergalactic war? The choice is yours. You can even travel back in time to change alter the history any way you see fit.
With the release of Era: The Consortium’s Rulebook Primer as a free download, we hope every fan of science fiction RPGs has the opportunity to to try it out, regardless of their financial situation.