Guerrilla's Looking Into Portable Game Development, Maintains Focus On PS3.

One little tid-bit references the NGP, and whether Guerrilla would be interested in creating a follow-up to their previous (and only) portable title Killzone: Liberation.

“It’s something we are looking at, but for now our focus remains on the PS3,” he said.

“We have built up our experience, tools, and engine on that platform. But as with all Sony hardware, we will always keep an eye out and see if there is something we want to be involved with. That’s really one of the benefits of being a first-party studio, early access to all of the new toys!”

A Killzone NGP title is currently in development at Sony's Cambridge studio. For now, you can read our Killzone 3 review through here.