1) The trilogy of video games have been praised as being among the best first-person shooters on a video game console, and are considered the Microsoft Xbox's "killer app".
2)The first Halo game was announced on July 21, 1999, during the Macworld Conference & Expo. It was originally planned to be a real-time strategy game for the Mac and Windows operating systems, but later changed into a third person action game.
3)Halo was not intended to be the Xbox's flagship game due to internal concerns and gaming press criticism, but Microsoft VP of game publishing Ed Fries did not act on these concerns. The Xbox's marketing heavily featured Halo, whose green color palette meshed with the console's design scheme.
4)Four Halo soundtracks, composed by Martin O'Donnell, have been released. The Halo Original Soundtrack contains most of Combat Evolved's music.
5)In 2005, a script for a film adaptation of Halo was written by Alex Garland—which D. B. Weiss and Josh Olson rewrote during 2006—for a 2008 release. The movie was to be developed and released by 20th Century Fox, under the creative oversight of Microsoft. Peter Jackson was slated to be the executive producer, with Neill Blomkamp as director. Before Blomkamp signed on, Guillermo del Toro was in negotiations to direct.
The crew stopped and resumed preproduction of the film several times. Blomkamp declared the project dead in late 2007, but Jackson replied that the film would still be made. Blomkamp and Jackson collaborated on District 9, but the director told /Film that he was no longer considering working on a Halo film if the opportunity arose, saying that after working on the film for five months before the project's collapse it would be difficult to return. The rights for the film have since reverted back to Microsoft.
The Electromagnetic Force.