1. Installing your game to the harddrive.
2. Getting a new copy of the game.
3. getting a new xbox ( yours might be old and cant handle the game unless its alrdy been into microsofts hands for repair (they normaly change the 360s main card and insert a newer better one, so you wont get the rrod again)
4. Getting a bigger harddrive.
5. buy a PS3 and prototype (jk)
6. try checking your disk, it might be scratched when made or sumthin (this goes back to nr.2)
cant think of any more, if ya do, holla
