One of the other digital downland PC game sites out there, owned by GameStop, is now carrying Valve’s PC titles. This is the first time they’ve been found digitally anywhere but Steam. For purchase, anyway. You still need the Steam client to download and install them, so I’m not sure what the big difference is, unless you’re trying to rack up reward points.
Either way, The Orange Box, Portal 2, Half-life Complete, Left for Dead, and Left for Dead 2 are now available on Impulse for your purchasing pleasure. Anyone up for a game of Left for Friends?