strange game effect

I was experimenting with an unfinished model and wanted to see it in the game engine, I pressed P for play and my model became semi-transparent. I am using multitexture but am not finished with them either, I have no idea what I have done wrong.

Can anyone explain why I can see through my mesh in game mode?

I can’t say much without seeing your blend file but the first things that come to my mind are: Check for non-manifold mesh. Remove doubles. Check your normals.

I should have posted more information because I am not only re-learning Blender but I am learning how to use this forum as well. There are no doubles in the mesh and all normals are properly positioned. I have narrowed the problem down to improperly applied textures but need to figure out what I am doing wrong, the mesh displays correctly without textures applied.