Halo 3 expect huge sales

The first Halo game, Combat Evolved, became the killer application that helped establish the original Xbox in 2001. At a time when many developers make deals to get their new releases onto multiple platforms, an exclusive game can give the Xbox 360 a boost against Nintendo Wii and PlayStation 3. "It will be the biggest first-day seller ever … it will grow the installed base," says Michael Pachter, an analyst with Wedbush Morgan Securities. With first-day sales of at least 2.5 million (prices range from $60 to $130 for a limited edition), the total could hit $200 million.