Because honestly, despite the fact that most of the games are repetitive reruns of the last iteration, they still have the most important aspect a game can have: COD games are pretty damn fun especially with friends. Even though I suck, I usually laugh maniacally throughout the games while...
Sequel. Come on, prequels always suck because you know how it's going to end. And I want them to expand the Universe, not revise stuff we already know. And the First Contact War only lasted for a couple of months and had relatively few casualties. Not something you could really make a game...
If you like Fall Out, you should definitely check out Deus Ex and the Mass Effect trilogy. They're still kind of open world, but they're a lot more story driven and awesome. Also, Fallout: New Vegas was kick-***.
Mine is not an actual fight scene per se, but it's still pretty darn awesome. It's from mass effect when I just think its awesome because it really showed how powerful the Reapers were. They Citadel needed a whole fleet to kill one, and there are thousands of them...
Honestly I won't miss them. The Cortana level in halo 3 was imo the worst one in the entire series, and I'm not going to miss the Gravemind's whole Dactyllic Hexameter thing.