This article explores the context of that era, the role of scene groups like Skidrow, and why "fixed" cracks were necessary for Ubisoft titles. The Context: Assassin's Creed Revelations and DRM

Because the save files were tied to an online profile, early cracks failed to properly write local save data, wiping out hours of player progress.

The following report provides an overview of the legacy "SKIDROW" release for Assassin's Creed: Revelations