Valve, proprietor of Steam -- which is basically the Walmart of PC digital distribution -- now has its games available on Impulse. Your confusion is as great as ours, but here we are.
The Impulse store, owned by GameStop, announced last week
that Valve titles would become available on the service. Apparently, the shock of this caused almost everyone in the media not to report this fact for an awkward length of time.
The Valve games available through Impulse right now are Portal 2, Left 4 Dead, Left 4 Dead 2, The Orange Box
, and Half-Life Complete
. Best part: the games still require Steam to play.