Halo 3: ODST. You start with your squad, get separated, get back together, and then the game is over. Nothing significant changes except some sexual tension is resolved and an engineer joins the humans for a brief moment.

Right, the books that also seem to constantly have continuity errors with the games. :P

Reading the books has actually taught me to not take Halo’s plot so seriously and instead just try to enjoy whichever piece of the story I’m currently engrossed in.