BBC reports from Amsterdam, and the reporter's first impression is that the hand-on gameplay session is mostly underwhelming.
"For a moment it appears as though Halo 3 has crash landed in Gears of War territory - the gothic and crepuscular Xbox 360 title. But after a few bends and turns you emerge onto the familiar candy-coloured landscape so familiar to Halo players.
And this is where the first disappointment sets in - graphically Halo 3 is more of an evolutionary leap than brave new world. It is Halo 2 on steroids with familiar looking colours, textures and flavours.
Everything has a high definition sheen but there are noticeable jagged edges to objects and buildings, and close up some textures look distinctly rough.
It should be made very clear that the game we were playing was beta code and not finished game, but I will admit to feeling underwhelmed."