Valve Corporation, PO BOX 1688, Bellevue, WA 98009, USA. www.valvesoftware.com
© 2009 Valve Corporation. All rights reserved. Valve, the Valve logo, Left 4 Dead, the Left 4 Dead logo, Source, the Source logo, Half-Life, Counter-Strike, Portal and Team Fortress are trademarks or registered trademarks of Valve Corporation in the United States and/or other countries.
|