Star Filled Studios, a two-man development outfit in San Francisco, has reportedly been acquired by Valve to set up a new Valve office.

Valve Time reports that Jeff Gates (programmer who has worked on Diablo 3, Sports and Plants vs. Zombies) and Tod Semple (Diablo 3, Plants vs. Zombies and Star Wars: The Force Unleashed) will be opening a new Valve office in San Francisco.

Semple's LinkedIn profile reveals that Valve made the acquisition back in September.

Valve acquired Left 4 Dead creator Turtle Rock back in January 2008 and later than year closed the studio, offering all staff work in Valve's Seattle offices. The studio was re-opened in 2009 and is now working on a new game for THQ.

Source: Valve Time