is there some cheats like all guns

I found cheats listed but I cannot get them to work for my XBOX

Does anyone know how to solve the "switch Puzzel"? This is where you need to enter a series of movements such as up, down, left, Right. But some of the items displayed are half circle or full circle and I do not know how to perform this function

thanks but what puzzle are ypu talking about

Here is a walk through that explains it (http://faqs.ign.com/articles/507/507191p1.html) but I got confused at 1st too. So if you follow the walk through the best you can by keep going to the switches only switches that need to be activated will light up green.