Granted, this tech demo is not interactive, but it was created using performance capture and a brand new game engine designed by Cage.

FORBES: Connect

Infinity Ward head Mark Rubin calls Ghosts "a new sub-brand" in the CoD franchise, and it's getting a new (unnamed) game engine to boot -- another indicator that previous characters aren't involved.

ENGADGET

By chance Lewis also met a former engineer from videogame maker Atari, Bruce Rogers, who was developing a new graphics engine and was working on a game of his own.

FORBES: Ordinary Hero

The game features a new engine called AnvilNext, which allows for greater resolution and more elements on screen at one time.

CNN: American history unfolds in 'Assassin's Creed 3'

The game will feature a new engine which Shibuya himself had a hand in developing.

FORBES: 'Dark Souls 2' Will Stay True To Its Roots, Hopefully

"Daylight, " which runs on Epic Games' new Unreal Engine 4 game engine, traps players inside a haunted insane asylum.

CNN: 5 video games to watch from GDC 2013

So, barring a new engine, I imagine this game will have to avoid that problem.

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Now gamers will get a sneak peak of this new Unreal Engine 3 game.

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And we pretty much develop a new engine each time we develop a new game.

ENGADGET

In stark contrast to the Witcher 2, the Wticher 3 will be an open-world game, boasting an all-new engine and a world 30 times bigger than its predecessor.

FORBES: The Witcher 3 Coming to PS4

The next-gen game engine was being shown off at GDC 2013 with a flashy new demo (seen below the break), as well as a version of its "Elemental" demo running on a PlayStation 4 dev kit (shrouded behind a curtain, of course).

ENGADGET