Actually, you're a little wrong.
Halo was important because it had very good controls for a console FPS, the regenerating shield was important, and the system link made the game more accessible to large amounts of people than any other (good) console game out there.
Halo 2 was important because of the online play and minor improvements to the game.
Didn't Unreal already use that system?
This thread is absolutely ridiculous though. I will set about derailing it with moderately humorous pictures and random posts.
A thing of beauty, strength, and grace lies behind that whiskered face.