Watch out for snakes!
I preordered Pokemon White, and I might be buying a cheap $15 airsoft rifle to use for a costume, along with some dummy grenades from the Army/Navy Store.
A WW2 childrens gas mask - which I then duly removed the Carbon granules from because they hindered my removing of the Asbestos laiden cloth, then I forgot to put the carbon back in - so I have a useless gas mask. Go me.
7 pieces of black foam board, 2 cans of spray paint (one copper, the other chrome), black paint, and some aluminum wire mesh.
With all that stuff, I managed to make an almost perfect replica of the Silent Hill 3 version of Pyramid Head's helmet in one weekend. Now I get to possibly do that again this year because I destroyed the other one I made. I can make it better this time.