Ok, I just purchased these games from Gamefly.
Tomb Raider Trilogy
South Park Stick of Truth
Two of these games, the outer edge of the disk is rough and chipped.
Fable Anniversary has two large chips in the disk, image provided with this post.
Tomb Raider Trilogy just feels coarse and rough to the touch, like it's been steadily chipped all around it but there isn't a large chip like on Fable, just the whole disk is frayed.
Both play fine, but I don't like the idea of having damage like this on my disks.
How exactly did this happen, what could have caused it?
You may have to zoom in to see the detail of the chips.