In 1999, when Microsoft was looking for a game that could help launch their first Xbox videogame system, they focused their sites on an unknown third-person action title that shared the stage with Steve Jobs during the 1999 MacWorld Conference and Expo.
That game was “Halo.”
In June 2000, shortly after confirming the release of “the Xbox project,” Microsoft bought Bungie Studios, the developer of “Halo,” in order to secure “Halo” as an exclusive launch title for the Xbox.
A few tweaks later- namely, changing the perspective from third-person to first-person and streamlining keyboard-and-mouse controls for a handheld controller- and the rest, as they say, is history.