As Half-Life 2 Episode 1, Half-Life-2 Episode 2 and Half-Life 2: Lost Coast install into the Half-Life 2 directory, they fail to work when installed to a different Steam Library (filesystem) than Half-Life 2.
This is understandable, but there is no error or warning that this will occur, and the error (Missing Executable) is far from self-explanatory.
As Half-Life 2 Episode 1, Half-Life-2 Episode 2 and Half-Life 2: Lost Coast install into the Half-Life 2 directory, they fail to work when installed to a different Steam Library (filesystem) than Half-Life 2.
This is understandable, but there is no error or warning that this will occur, and the error (Missing Executable) is far from self-explanatory.