Because this is the new RUMOR floating around based on a supposed concept art leak:
http://gamingbolt.com/stars-of-barathrum-open-world-space-game-from-valve-concept-art-leak
// Mod Edit:
Original link with more art: http://www.facepunch.com/showthread.php?t=1217651
http://gamingbolt.com/stars-of-barathrum-open-world-space-game-from-valve-concept-art-leak
// Mod Edit:
Original link with more art: http://www.facepunch.com/showthread.php?t=1217651
Facepunch said:An inside source has confirmed that SOB (Valve's new IP) is an unannounced game entitled Stars of Barathrum (working title). Plays like privateer/freelancer but also with the ability to command larger cruisers and capital ships. It's a very vast and open-world game where you choose your own adventure, a lot of internal resources are being put into SOB.