First on Xbox 360 - will appear on PS3 and PC later in June.
Can make LEGO video games across multiple platforms through 2016.
3D glasses 'detach you from others in the room'.
preview : LEGO Harry Potter: Years 1-4 Interview
Producer Loz Doyle reveals the magic behind the LEGO.
Dev refuses to deny LEGO Lord of the Rings or LEGO The Hobbit games in the works.