A stunning CGI trailer for Watch Dogs has been leaked online, revealing a mission in which overcoat-wearing hacker Aiden Pearce tracks and takes down a human trafficker.

The trailer features a mix of slick hacking and brutal action sequences, including a close up shot of a bullet to the head.

Aiden Pearce himself apparently leaked the video on Vimeo.

Expect a full gameplay demo during Ubisoft's E3 conference tonight at 11pm - watch and chat live with VideoGamer.com