The CDs are just as susceptible to scratches and intense heat as regular audio CDs -- even more so in fact, since a scratch on a game CD can make it totally unusable.
Here are just a few examples of PS2 games:
Games for the PlayStation 2 are coming out at a rapid pace. Since it will play older PlayStation games as well, it offers an incredibly large existing game library. Game prices range from about $20 to $70.