Sony Computer Entertainment's much-discussed PS3 sequel to Killzone has finally re-surfaced, in a new demonstration trailer shown at GDC today.

The one minute trailer was shown after the official announcement of the PLAYSTATION Edge developer software to demonstrate the physics engine in the shooter sequel, with various ragdoll-powered enemies being flipped every which way by dual hits to the head and legs.

Sony representatives urged audience members not to judge the graphics in the trailer, which many press attendees said were looking early.

Kotaku said of the trailer: "Visually it was certainly less impressive than the infamous E3 2005 pre-rendered target trailer, that's for sure. Animation quality varied, looking awkward at times."

The trailer could also be seen listed on screen during Phil Harrison's GDC Keynote, though it was apparently decided to keep the video behind closed doors for now.

As for when we can see Killzone PS3 in action, all signs indicate that the re-scaled E3 show in July will be the main platform for the sequel, but we'll let you know when more news hits.

via cvg