There is 1 Dead Ghost to be found in Vertigo. They can be collected during any match. Each Ghost can only be collected once per account.
Ghost 1[edit]
Head toward the portal at the back of the map. This is at the top of a slope and a pair of staircases from either side.
Turn to the right, facing the portal, and go down the stairs there. Look on the right and in the sand you will find the Dead Ghost.