 The reticle serves as an aiming and focal point, preventing dizziness in similar fashion to the dance technique called spotting.Aside from this reticle (which can be hidden by the player), no heads-up display exists in the game.The demo for "Mirror's Edge", consisting of the game's prologue chapter, was released via the PlayStation Store on October 30, 2008, followed by the Xbox LIVE Marketplace on October 31.