The first thing that I would do when I get Halo 4 is the Campaign. I will the Campaign first because I want to know the Halo 4 story. Then I will do the Campaign again to get the achievements and do Legendary to see the last ending of the game. I am asking this because maybe someone will do Forge mode, War Games, or Spartan Ops at the start. I want to hear what you people will do first?