Make sure that you let the installation finish completely… it can seem to freeze for a few minutes at the end, especially if installing full HLSP support to Steam. Just click Yes to force installation to the directory.
A couple of things to check if you’re having problems with 3.0: If you’re definitely installing to your correct Steam Half-Life directory, but the installer can’t find a valid HL installation in that folder, it’s probably because you haven’t played a single-player game of Half-Life in Steam before, so the files (such as hl.exe) haven’t been extracted. We’re currently third place on FilePlanet’s Best Mod of 2003, below only one other Half-Life mod. In any case, the release has gone really well! Tens of thousands of downloads within the first day, over 750 people playing online simultaneously only a few hours after the release, etc. Apologies to everyone whose e-mails I haven’t answered… afraid it might be quite a while yet before I get the chance. I’m stuck in a neck brace at the moment… sitting at the computer is sort of awkward.
Sorry about the delay, but the day after the release I threw my neck out or something. NS2.0/SC3.0 Incompatibility fix, RE: The Awakening Released, Etc!
