Faces doesn't show up in game? I've got a question.
I modelled a character and importet it into Gmod. I had the problem recently, that some face were flipped. 
Then I searched how to fix it and in Blender, it seems that they are showing to the right direction.
But when I'm running the game, the faces on many spots of my character were still invisible when I look direktly from the front...

Here are screenshots of my issue:

This is the edit mode in blender, and the Faces are showing to the right direction o-o


here are they still missing. The characters right eye shows up when I'm turning to the left...

In crowbare, everything seems to be alright too...

so what can I do? did I oversee something there?
(btw it's my first character and playermodel I did ^^')
Silly question; have you tried flipping the normals, and checking that no overlapping faces are present? Its hard for me to see the normals on the left part of the face, and the right looks fine as of where I can see them.

Other than that check that the Vertices are not being weight pulled by other bones. Check it in zero mode in the left hand tool panes when weight painting.