According to The Verge, source code for the original Xbox and Windows NT 3.5 has leaked online. The leak reportedly contains the kernel for the original Xbox OS, build environments, testing emulators, and internal development documents. This leak may help further emulation efforts for the original Xbox which as of now can only play ~40 of the over 900 games released for the console. This isn't the first time Microsoft has suffered a source code leak, with partial Windows 2000 and NT 4 source code leaking back in 2004 but given the age of the software this is unlikely to be of much significance. A Microsoft spokesperson told The Verge that "We're aware of these reports and are investigating".