Kantor on 14 August 2009
The only reason they develop on 360 is because it's extra sales with little effort. They have no obligation to waste their time developing for PS3, because the architecture is too different to the 360 and PC, especially because their games probably wouldn't sell as well on PS3 as 360 or, especially, PC. Not sure why you'd want a Valve game on a console, though.
EDIT: Valve aren't lazy, they're just intelligent. A PS3 version is more work than it's worth.
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