First, you'll have to download the XNA Game Launcher off the XBLM. You can find the this little doodad by going to New Releases > Game Content > XNA Creators Club. Once that 7MB file downloads, make your way to your XNA Game Launcher by heading to your Games blade > Games Library > My Games > XNA Creators Club. Here you'll be able to press "Y" and download all seven XNA trial games for free. Once you find a game and download it, you'll then be able to launch your demo from the same location. That's it, all done. And to get you started, we've posted a description of all seven downloadable XNA game demos after the break. Find something that appeals to you and give 'er a download. Oh, and have some fun too.