When it comes to halo the lore after 3 is boring, cortona they fucked up, multiplayer and halo junkies will remember details like trying to kill a race of aliens, the relationship between master chief and an AI hologram, obviously Halo 1 doesn't have running, but regarding the campaign only wtf? MP is a necessary component to Halo (sections to jump, holding higher grounds, throwing grenades around corners, you have an announcer, trashtalk and fighting inside alien buildings all must have features for modern day multiplayer shooters. This is something Activision did with MW2, and should be avoided.