And they go twice that happen to me, I was playing the campaign on Legendary (split screen) and the level DELTA HALO legendary, at the end of the mission, change the graphics to the old and now the game was reflected, bringing me back the menu and lost all my progress (of the mission). The same happened to me in the next mission REGRET (legendary and split screen), the first time this mission was on the cinematics where you get to the main temple, change for a moment graphs and shaped with a rare sound, and the the second time was facing me to weigh, just when you change the graphics and my progress (of the mission) went away. As you can see, I’m very angry about that, so what I ask fix that mistake at least in my console (via wi-fi) or the game I mark that the mission is completed and coperativa legendary. I will check the disk (to see if it is dirty) and porbare again, if you follow this Tendre mistake to take more stringent for you action, I was not to change the game with guarantee since he had played missions split and lonely screen, but I did not spend that, since DELTA HALO and REGRET never had played in legendary split screen. > 