"We were absolutely adamant that we needed a button, something with haptic feedback, that would initiate an action," said Rare creative director George Andreas to Edge magazine (via CVG), recalling his first time seeing the Kinect technology. "It took a long time -- we threw some prototypes together and then we saw you didn't need one."

And it wasn't just Rare that wasn't convinced about buttons-free controls, as Andreas said Lionhead Studios boss Peter Molyneux didn't see the buttons-free system working either. "We were very vocal to Kudo [Tsunoda, Kinect lead] at the time, and Peter Molyneux was as well, that you needed something in your hand," Andreas recalled. But he also says this was ultimately just a case of having to "rein in" their ideas of traditional button-based interfaces, a challenge that remained even after accepting Kinect's buttons-free system could work. "You end up falling back on the [gamepad] control scheme. It's a crutch really."

Players can hit up the DJ Hero 2 demo to sample the game's brand new multiplayer modes, while the Guitar Hero demo highlights developer Neversoft's attempts at a story-driven quest mode -- complete with narration by Gene Simmons of KISS. PlayStation 3 versions of the demos have yet to be announced.

Each demo includes a selection of four tracks, listed below:

Both of the veteran actors have been in countless movies. Oldman is most known recently from his roles in The Dark Knight and The Book of Eli. In Black Ops, he'll be reprising his role as Viktor Reznov from World at War. Harris, meanwhile, is recognized for his roles in A History of Violence and Apollo 13. He'll be playing Jason Hudson, a CIA operative. David S. Goyer has written for both of the recent Batman films, Blade, and the upcoming Superman: Man of Steel.

"Oldman, Harris and Goyer are considered some of the finest talents and they perfectly complement Call of Duty: Black Ops' ambitious and immersive single-player experience," said Treyarch head Mark Lamia in the press release. "Their contributions have helped us to push the boundaries of our story telling and character development far beyond anything we have ever attempted before in the franchise."

The news actually leaked out thanks to voice actress Emily Rose, who plays character Elena Fisher in the game. "Landed in LALA land yesterday and already the schedule is a buzz.... filming my first Night show today 4 #HAVEN then work on #UNCHARTED!" tweeted Rose yesterday.

This tweet created a short-lived buzz that Naughty Dog was already working on Uncharted 3, but a Sony representative quickly squashed the rumor by confirming to Kotaku that this "Uncharted work" was, in fact, for new Uncharted 2 DLC.