There is a rule in film industry; When a movie makes a $100+ million dollars debut in its opening weekend, you can expect at least a sequel. Well, a similar rule applies for videogames. If a game becomes a million seller you expect a sequel and if that million seller becomes the fastest million-unit seller ever for any next-generation console and the "Video Game of the Year" (across all platforms including the PC) you expect from the developers much much more. Not just a sequel but that the developers once again deliver the best video game ever:
HALO 2: HALO EVOLVED
"Halo 2 is a lot like Halo 1, only it"s Halo 1 on fire, going 130 miles per hour through a hospital zone, being chased by helicopters and ninjas," said Jason Jones, Bungie Studios head. "And the ninjas are all on fire, too." That"s how the lead designer of Halo 1 describes its successor.