I didn't make it!
I just went on steam today and its now saying that hl2 and counter strike and hl2 dm isn't installed but when i looked in the steam folder the hl2 and cs files are all there???? im confused.
:moved: from HL2 general.
Maybe a bug try to quit steam and than restart it.
Well i had a prob with a lot of my games i uninstalled it and reintaled it.I didnt do this but u could cut or copy some or all of the mods u want to keep.