Hidden Path Entertainment (also known as Hidden Path) is an American video game development company based in Bellevue, Washington, United States. It was founded in 2006 by Michael Austin, Jim Garbarini, Dave McCoy, Jeff Pobst, and Mark Terrano. In 2008, Hidden Path released its first original title, Defense Grid: The Awakening on PC and in 2009 on Xbox. A downloadable title, Defense Grid garnered high acclaim with its unique twist on tower defense and has sold over half a million units since its release. In 2009, Hidden Path began working with Valve Software to update and maintain the highly successful and critically acclaimed product, Counter-Strike: Source, first released in 2004.