DICE and Electronic Arts have unlocked the Time Trial mode in the recent demo version of Mirror's Edge for PS3 and Xbox 360.
To unlock it, all you have to do is click Race and then Play Time Trial in the main menu and enter any 16-digit number (incidentally, the press release helpfully suggests "0000-0000-0000-000" - oops).
Time Trial mode involves legging it around the game's pristine city against the clock, stringing together all your best moves to save time. You can also download ghosts of your friends doing it to try and beat.
EA also says that the unlocking trick should work whether you're downloading the demo afresh or have had it for ages.
The demo also includes single-player tutorial and prologue sections for those of you who haven't had a crack on Mirror's Edge at all yet.
Mirror's Edge launched on PS3 and 360 in mid-November and picked up 8/10 in its Eurogamer review. It's a game about running around rooftops and buildings stylishly from the first-person perspective, and when you get into your stride it's very good.
When you don't, however, it's a bit jarring, and the indoors bits are rubbish, and the story's really irritating.
Fortunately the Time Trial bit is excellent, so give it a go, and owners of the full game can look forward to more Time Trial maps set in a crazy VR world devoid of proper graphics, which looks dead slick, in January.
The game's also due out for PC on 16th January, and will boast all sorts of graphical improvements when it does.