Attached is what I am working on, it is my first time trying to use the game engine and I have been frustrated by whats happening for so long. It is a tank and I have the basic controls of moving forward backward left and right, but when turning left or right the middle of the tank seems to rotate around a point in the middle.
Here is a video:
We often get this problem if objects are parented the wrong way.
Post a .blend please. That would be way easier to help
http://rapidshare.com/files/418146128/Tank.blend There is the blend file, just open it hit 0 and P and move using the arrow keys, the turret is controllable using numpad 4 and numpad 6. Many times I tried unparenting everything but I am very new to blender. Once this problem is solved though I have alot of improvements I can do to the tank.
I got it working, you were right though it was the parenting