Originally developed as a
real-time strategy game for the
Apple Macintosh platform,
Halo: Combat Evolved went through several iterations before arriving at the console first person shooter for which it is recognized.
[12] When the developers, Bungie, were bought by
Microsoft in 2001, the game was rapidly finished and became an
Xbox launch title and platform exclusive.
[13] Released on November 15, 2001, the Xbox version of
Halo: Combat Evolved is the first
Halo video game. A
Windows and
Mac OS X port was later developed by
Gearbox Software, and released on September 30 and November 11, 2003 respectively.
[19][20] A stand-alone expansion, entitled
Halo: Custom Edition, was released as a Windows exclusive, and allowed players to create custom content for the game.