I have Halo 3 for my 360 and have been playing it a bit but dont understand the storyline. so I just re started the game then on a harder setting and I want to get a feel for the game instead of just shoot kill win. I think the reason I dont understand the story line is because I never played Halo 2 I only played halo 1 now strait onto 3. so is there anything I should know that happened on Halo 2 that will make the story line make more sence to me on halo 3?