The move is set to upset Sony, who is banking on consumers having to go online to buy games for the new PSPgo, which is struggling to get traction in the marketplace because Sony has removed the UMD from the current model.

The Logitech device will allow owners to play the entire PSP library without the need to purchase new digital versions from the PlayStation Store. 

The new Logitech device will plug into the PSPgo via the memory stick port, say sources.

In Australia, the new Sony PSPgo is struggling to attract buyers, with consumers complaining that the online games are too expensive. According to Pocket Gamer, Jon Burton of Traveller's Tales (Lego Star Wars, etc.) said at the Developer Jury Service that the shiny new PSPgo will die if the downloadable gamers aren't cheaper than UMD games.

"I own a PSPgo but don't want to buy LittleBigPlanet, for instance, as I can get it 20 per cent cheaper on UMD from Amazon and could resell it once I'm finished with it," said Burton. "But if I download it, I get no discount, and no chance to resellhow annoying is that?"