Microsoft hasn't denied rumours posted on a popular blog site that its gaming subsidiary Bungie could be parting ways with the software giant. 

The rumour has surfaced on the gaming ezine 8BitJoystick, via a blog on the Seattle Post-Intelligencer's Web site, that the Halo developer wants more freedom to writes games for platforms other than Xbox.
Both companies have refused to comment on the rumours – but it's significant that neither have denied them.
Bungie has developed the highly successful Halo game series, the lastest of which, Halo 3 debuted last week.
The company has been part of the Microsoft Game Studios for the last seven years.