2. Sticky Detonator
One of my favorite games for the Nintendo DS was Goldeneye: Rogue Agent. It was a blast not only because it allowed my cousin and I to frag each other from across the room (which was amazing to us when the DS first launched) but it had one weapon in particular that made the whole game ten times better. It was a pistol that fired a small red orb which would stick to just about any surface, and could be detonated with another press of the trigger. If you managed to hit someone in the face with this, they would actually be able to see the orb on their screen. Now when I heard that Halo 4 would be implementing a similar weapon, I was ecstatic. The weapon itself resembles a more compact version of Reach's Grenade Launcher, and propels small, sticky orbs to surfaces which can then be detonated at will. There are so many awesome possibilities for this, it's kind of hard to think about. Custom games will benefit from this in an especially awesome way, if you ask me. You could easily turn a Warthog into a mobile bomb, or another player into a slightly less willing mobile bomb. This could make for some pretty interesting game types. I was really hoping that multiple projectiles could be launched before detonation, but I suppose that's a tad greedy.