Memory is a fickle thing. You may think one thing, but the reality of the situation in question could be entirely different. Was that thing there? What even was that thing?

In Gears of War Judgment, Lt. Damon Baird is on trial for disobeying COG orders - being a military outfit, they're kind of big on following orders - and must recall the events that lead up to the disobedience in question. His recounting of the events while on trial is the entire campaign, but this being a military trial, certain things are classified. It's an idea that will play out in the campaign: the first time through, certain elements from the game environment will be missing; a second playthrough of the "Declassified" campaign will change events and those in-game elements.