All Valve Intros (1996-2015)

Yup, it’s all of them :D *************** Valve Corporation (formerly Valve Software, commonly referred to as Valve; stylized as VALVE) is an American video game development and digital distribution company based in Bellevue, Washington, United States. Founded in 1996 by former Microsoft employees Gabe Newell and Mike Harrington, Valve became famous for its critically acclaimed Half-Life (released in November 1998) and Portal series (released in October 2007). It is also well known for its social distribution network Steam, and the Source engine, which has been used in every Valve game since its introduction in 2004.