Rumors about an anti-used game system in the next Xbox -- codenamed Durango -- have swirled for some time now. Vgleaks posted a number of screenshots today, reportedly displaying information contained in the Durango Xbox Development Kit (XDK). The screens, which IGN sources have verified as accurate, confirm a number of rumored features of the next-generation Microsoft console , including a new high-fidelity Kinect sensor. But perhaps a troubling revelation for used game purchasers, the documentation includes a rather blunt reference to mandatory game installs.

"Every Durango console will have a hard drive, although its exact capacity has not been chosen," reads help documentation in the Durango XDK. "It will be large enough, however, to hold a large number of games. All games will be installed on the hard drive. Play from the optical disc will not be supported."The documentation goes on to state Durango games will be distributed on Blu-ray discs, but the discs are purely used as a means to install data, and will not be read during gameplay. Also of note: the Durango will feature "Always On, Always Connected" online connectivity. Whether Microsoft will use the always-on functionality as a means of DRM is unclear; the documentation only mentions background updates, similar to those announced for the PlayStation 4 Such a system could spell big trouble for used game retailers like GameStop, and even larger issues for gamers who depend upon the lower cost of second-hand discs.

Matt Clark is a freelance writer covering the world of videogames, tech, and popular culture. Follow him on Twitter @ClarkMatt and MyIGN at Matt_Clark