There is 1 Dead Ghost to be found in Skyshock. They can be collected during any match. Each Ghost can only be collected once per account.
Ghost 1[edit]
Go onto the open side of the map, where the crashed plane is. Head on down to the tail section of the plane.
Go to the lake side of the tail section. Look at the farthest separated section and find the bush on the left-hand side. There is a bush there with the Dead Ghost in it.
