UPDATE: Dissidia duodecim prologus will cost £2.39 in the UK, Square Enix has confirmed.
ORIGINAL STORY: Dissidia 012[duodecim] Final Fantasy prologue Dissidia duodecim prologus is one hell of a mouthful. Oh yes, it's out in Europe and other PAL territories on 23rd, March.
It costs €2.99 from the PlayStation Network.
The prologus lets players control Final Fantasy XIII star Lightning in a scenario recounting the events leading up to Dissidia 012.
Getting the prologue nabs you Final Fantasy VII's Aerith (isn't she dead?) for use as an assist character in the main PlayStation Portable game.
You can also transfer in-game items across the virtual divide.