You need to be in a Private Freeroam session
-Go to Undead Overrun
-Go to the Blackwater Graveyard level
-Let the Game go into Sudden death
-While in sudden death return to Freeroam
Walla every single Zombie that was alive when you quit should now be alive in Blackwater Freeroam
-Go to Undead Overrun
-Go to the Blackwater Graveyard level
-Let the Game go into Sudden death
-While in sudden death return to Freeroam
Walla every single Zombie that was alive when you quit should now be alive in Blackwater Freeroam
