While it is a solid halo game, it was not everything it's cracked up to be.
gadgets, similar to grenades, and some very cool new vehicles and weapons. The story is compelling and interesting to the point where you almost wish the action was over to see the rest of the story unfold. Another really cool thing I liked that was not in halo 1 or 2, is the way the story revolves around BOTH characters in co-op. All that aside, the game lacks more playtime (assuming you don't have online or any friends). I expected to be playing for a lot longer in campaign the I really did. I spent about 3 1/2 hours altogether, and was a little bumbed. But don't take my word for it, the game is an instant classic regardless of playtime and even more fun when you and all your buddy's are playing against each other.
P.S. The end was fantastic........