Marathon game director Joe Ziegler has announced that he’s leaving Bungie for a new job, and his departure comes at a tumultuous time for the studio. Ziegler said in a note that taking over for him as game director on Marathon will be Del Chafe III, who was previously the assistant game director. Chafe III will work alongside creative director Julia Nardin to “guide the game forward.” “Both of them have been operating in a strong leadership capacity for the…