Marcus Holloway is a fictional character from Ubisoft's Watch Dogs video game franchise, first appearing as the player character of the 2016 title, Watch Dogs 2. Marcus is introduced as a young hacker (known online by the alias "Retr0") based in the San Francisco Bay Area who is wrongfully flagged with a criminal profile by ctOS 2.0, the electronic mechanism employed to manage the region's infrastructure and surveillance network. Marcus succeeds in wiping his profile from the system, and joins the hacktivist collective DedSec to raise social awareness about the risks posed by ctOS 2.0 and expose the corruption of its creators, the Blume Corporation. An older Marcus makes a voice-only cameo appearance in Bloodline, a 2021 downloadable content (DLC) expansion for Watch Dogs: Legion, which st