How to Download Demos and Play Them on Xbox 360

Steps

1. 
   1
   Check if you're are on X-box Live. If not then there are no demos available for offline users. (Unless you buy a magazine with a demo disk in it.) If you are online, read on.
2. 
   2
   Go to 'X-box 360 Dashboard' then go to the game marketplace.
3. 
   3
   Go to the demos option on the marketplace, and find the game you want.
4. 
   4
   Click download (on the game demo) and wait for the download to start.
5. 
   5
   When the download is complete, press the X-box button on your controller.
6. 
   6
   Go to quick launch and press the right button on your d-pad.
7. 
   7
   Select the demo you want and hit A. Your demo should load. Have fun!