Quote Originally Posted by Tupin View Post
I've only ever gotten this on CD-Rs, and I would assume they are a lot more common on them than on pressed discs.

It may not be relevant to your interests, but LaserDiscs often had laser rot, especially ones manufactured by Sony in the 90's. LaserDiscs had to be made in a very sterile environment otherwise they would be messed up.
You know how much music I buy. A lot of stuff from the 1990s and earlier now has disc rot. Even one CD I bought that was fine experienced rot a few years later, and this is why I now back everything up to FLAC ASAP.

I don't believe I've ever encountered a single console game with disc rot - Sega and Sony's manufacturing plants were pretty good at what they did. However I have found a few PC games that have died due to it.