Halo, Must be say Hello...
Now now, is the gameplay... Prepare to be impressed, This game has awesome gameplay like in Halo 3. I cant say the different, But the Campaign and the setting of places are very exciting, The dark places and More chalenging Alien invasion, But it sometimes frustated. And u still use the previous weapon. But more improved graphic. And More detailed Night vision with object and creature detection make u can see the differences between object, enemies and Friends.
And more freedom gameplay mode in open world exploring in mission "prepare to drop". To confirm the mission, u must investigate some clue that will revealing the story. If u found one, the story will be flashback and see what happen till the object be founded by The Rookie. (the one who found the clue). Fully exploration make this game boos into a perfect games although is just an Expansion of Halo Series.
And the most exciting mode, Firefight mode, It keeps u shooting through great atmosphere and Explosive gameplay and Match.