Footage of Sony's forthcoming handheld - the NGP - has surfaced online, showing the device in action ahead of its appearance at next week's E3 Expo.

In a series of clips uploaded to the Official PlayStation Blog, the quad-core device - rumoured to be unveiled as PS Vita next week - is shown running Uncharted, a musical game called Sound Shapes and Wipeout HD, with the latter used to demonstrate cross-platform functionality.

Apparently, users can gloat by sending pictures and video of themselves taunting opponents after a heavy loss.

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