I tried everything RabidMonkey mentioned, but the following error came up.
Unable to find gameinfo.txt. Solutions:
1. Read http://www.valve-erc.com/srcsdk/faq.html#NoGameDir
2. Run vconfig to specify which game you're working on.
3. Add -game <path> on the command line where <path> is the directory that gameinfo.txt is in.
Tried all these, but of no help.
vconfig does not work.
Added the game path as instructed by R1Co and RabidMonkey, but of no use.
It worked in the previous version of half-life, but orange box is driving me crazy. I really want to learn about modding, but even these small options are giving me problems. Somebody please help!