Halo: Escalation

Set in the years following Halo 4, this 2014–2015 Dark Horse series bridges the gap between that game and Halo 5: Guardians. Written primarily by Duffy Boudreau and Chris Schlerf, with art by Sergio Ariño and Ian Richardson, the story follows the crew of the UNSC Infinity as they confront a new threat from the rogue AI Cortana. A key narrative link in the Halo saga, Escalation expands the lore of the post-war galaxy.