All Models Are Wireframes

I thought this might be a relatively trivial problem but after searching for ages I have found no answer. Why are all models in the 3D view showing as wireframes? This is for all games so I believe it’s a hammer setting of some sort.

[img_thumb]http://i.imgur.com/NgbdeVf.jpg[/img_thumb]

I think you can change that in the settings so it shows the texture of it. Not 100% sure though.

Managed to fix it

Why not share how you fixed it so others can learn from it?