KDG Rings

General Information

Ring based DRM associated with and most likely made by kdg mediatech AG and their Austrian partners in Koch Digitaldisc. Real name might be "Alactraz", but this is currently unconfirmed.

It's mostly found on games from central Europe and the late 90s.

Identification

Discs with this protection carry 2 or 3 very large (cm sized) physical rings totalling between 10k to 50k sectors. They also have associated dummy files called ".prt".

All discs seem to be from the same ifpi L171 plant. Note though that kdg/Koch discs don't always carry mastering SIDs.

Dumping

Follow the Ringed Disc Dumping Guide