God I hate Steam.
I recently had to re-install my retail copy of HL2 due to my system crashing and some files getting wiped. Everything copied from the disc fine, but when I went to put in my serial number, I was told that it had already been entered by someone else (even though I was using the same account I had previously registered on.) But I still have all the GCF files on my comp, so I was wondering, is there a way to run the game without Steam, using GCFScape or something like that?