When Microsoft released version 1.0 of the XNA Framework they had a couple of parties, one of them here in England. If you were there then chances are you got hold of some of Rare's XNA tests that they coded up. If you weren't there then now you can.

We have several new downloads available, from simple examples to full-on 3D platformers with in-game editors. There's loads of good code to pore over. You can get them in our downloads section. Oh, one thing most of them are setup for the Xbox 360, but the code is still good for Windows.