Sony explains how ensure you don't miss out on the freebie.
Sony Computer Entertainment UK has published details explaining how new PSPgo owners will be able to register for a free download of Gran Turismo.
First you need to buy a PSPgo in one of the participating countries. Next, login to the PlayStation Store on your PSPgo with a new or existing PSN account. Once in the store, download the Gran Turismo Theme which will be highlighted at the top of the store. You will then be sent an email with a voucher code to download Gran Turismo for free - prepare to wait though, as Sony says the voucher could take up to a week to arrive.
All this has to be done between October 1 and 10, although the actual download code will be valid until October 1, 2010.
For a more detailed, step-by-step guide on claiming your free download head over to uk.playstation.com.
While you're waiting for the calendar to tick over to October 1 you might as well check out the Gran Turismo review here on VideoGamer.com.