counterstrike i cant find it!

[Prodigy54321]

I've bought source like 3 times or something retail...

you can get is separately (only found it like this once though at gamestop)...

or you can buy half-life 2 which may come with cs:source...just check the box...(most of the half-life 2 retail versions come with other stuff too..usually source, I think)

cs: source individually cost me $30 I think and half-life 2 with source cost me $50