Halo was intially developed for the Mac and PC. A lot of dev work had already gone into Halo before MS acquired Bungie.
Halo came with built in buzz built from its inclusion of vehicles, past Bungie success and the odditiy that it might be the first exclusive Mac title that made PC gamers salivate. How many titles have you ever heard Steve Jobs announce at MacWorld?
Half of all gamers who bought a Xbox bought Halo at purchase, it was well recieved from the get go. MS purchase Bungie for the Halo franchise, the potential of the franchise was seen way before its release.
None of this refutes any of my points, Microsoft put alot more money into PD0 and Brute Force, why weren't those received well? How did Microsoft's investment give ALL of Bungie's Xbox/X360 games great reviews?