DICE and EA have made it possible to unlock the Mirror's Edge Time Trial mode in the recently released demo for game.
The mode can be unlocked for both the PS3 and 360 versions of the demo, included demos that have already been downloaded.
To access it you'll need to hit Race, then Play Time Trial in the main menu of the demo, and then enter any 16 digit code. Funnily, EA suggested "0000-0000-0000-000", which the mathematicians among you will realise only has 15 digits.
For those that don't know, the game's Time Trial mode sees you challenged to find the fastest route across various maps. You can then upload your best time to the game's leaderboards for your friends to download and compete against (you can even see your friend's ghost as you race to beat it).