Valve’s Games Available On Impulse

Valve's games launched on a rival digital distribution platform
GameStop has announced that several games from Valve are now available to purchase via the Impulse digital distribution service. Note that the Impulse versions of these games, which includes both Left 4 Dead, Left 4 Dead 2, Portal 2, The Half-Life Complete Collection, and The Orange Box, are still requiring Steam activation. Thanks: Gamasutra.