I believe that there should be a type of survival mode available in the game. The game lost a big part of it when Firefight was removed, but its still an amazing game don't get me wrong. But what I'm saying is add a new game mode called "Survival" or "The Flood" where you survive hordes and hordes of flood or Covenant (Your choice) and see how long you last. Basically just like the Black Ops Zombie mode, but Halo style. You will attract so many more customers if you add this game mode, it would really add to the depth of the game. Get back to me!