HelP!! Why won't my Dreamcast play a lot of games?

[terminator]

try to make an image of these cd´s with your pc.
if you got read errors, throw them into your
rubbish bin.

if you don´t get errors maybe that cd are from a
low quality brand.

reburn them with brands you know they work.

and there are still some other reasons,
games will not work.