Halo 3 took the best elements of Halo 1 and Halo 2 and turned out to be a hellofa good game.
Halo 2 was a mixed bag. While it added online play via Xbox Live, and finally let you wield those cool energy swords, the singleplayer-game was buggy and felt incomplete.
The original Halo game released the same day as the Xbox. Halo become a big hit in a large part to its split-screen and LAN network play, physics based vehicles, and it's composite, yet compelling...