my xbox only plays certain game, and some games are in better shape than the ones it does play. Why is it?

Answer 1

Have you tried spraying out the drive with some canned air?. My PS2 used to have the same problem and that fixed it up quite nicely.

Answer 2

if your lazer reader is dirty you can buy a cleaning disk at best buy for like $15, but if it's the hardware (my friend's x-box have a hardware problem) thoese are harder to fix you would need to bring to a gamestop or gamecrazy and see if they can fix it.

Answer 3

It may be that the disk drive lens is dirty because mine did the same thing until I cleaned it.