 No word has been said by the game developer but they helped Valve modify "Left 4 Dead 2" and other Valve games to be played with the Razer Hydra Motion control, and an official SDK is available for download in Steam's 'Tools' page.It was subject to a demo under the name Sixense Truemotion and tested to a close focus group of PlayStation Underground Members in August 2008, where its full functionality in various types of games was shown.It is now called the Razer Hydra and has been released through Steam and Razer's official website on June 16, 2011, for US$139.99.