Do valve give you half-life source if you add the original to steam?

[Mattyjw]

I'm considering seeking out my original HL game of the year cd's the one's that came with opposing force so was wondering if they will add to steam and if Valve give you the source versions or just the original ones?

 

[Mattyjw]

I don't think it's a mod but looking at Steam i doubt that they'll give the source version for owning the original one, especially as they sell both separately.