Probably dust particles and slight rotation while in the backpack.
Oh this takes me back
Likely a slightly warped CD case with a grippy bit in the middle that’s undersized. Which means the discs can rotate and then collide with the case. But key to the scratches is the undersized grippy thing, a good case won’t let your discs spin.
Cheap cases have been doing that since I was a kid and I burned my first CDs back in the day. Nothing quite like being the cool kid with a CD burner back in the day.
God I’m getting old.
What’s a “rulecord”?
Are you sure it’s the case and not the dvd player? My old PS2 would scratch the disks with its lens and made circular scratches similar to this.
I ruined so many games that way. Once or twice was me bumping the Ps2. Other than that it was just being a petty fuck.