Subtitled "Game development is an exercise in adaptation and change," PlanetXboxSpy's Halo Developer Diary is online, written by Bungie level designer Jaime Griesemer and promised as the first installment in a series of such articles. The debut diary discusses the changes in game plan for constructing this upcoming shooter spurred by Bungie's acquisition by Microsoft, and the interrelated decision to make Halo an Xbox title, which, as the following quote illustrates, caused a refocus on the Halo single-player experience:

The decision to move to Microsoft and work on the Xbox lead to one more decision, to focus more on the solo-player campaign than we had previously planned. This change, however, is simply a pragmatic one. As much as we want to help shape the newly forming Xbox community, we have to recognize that it is a console community. Online multi-player may be the future of console gaming, but it is not the present, so we knew we would have to have an incredible solo-player campaign to reach the audience on the same level that Marathon did. We're not abandoning multi-player by any means, we are pushing it farther than anyone expects us to, but Halo lends itself to epic and dramatic storytelling, so that is what we intend to provide.