Crackdown was also there on the Microsoft booth, and here is a clip showing sandbox gameplay at day and night. Since E3, the framerate is now perfectly rocksolid, as every X360 game using UE3 on the show.
Xboxyde also noticed the online co-operative mode was finally implemented, and totally playable. Except for these details, nothing new. No word on the mission system, the scenario or the cinematics. Xboxyde hope X06 will put some light on these dark areas.