The Deathcore Project is a experiment of re-animating German soldiers that were killed in the war.
The projected is leaded by Dr. Hess who is being threatened with his life to complete it by General Müeller and Major Kraus. Dr. Hess is succesful in bringing the soldiers back as zombies, but they are not loyal and turn on him. Later when the Nazis steal the serum from Andre Toulon he tries to incoporate it into his work, but he does not get the results he was looking for, all of the subjects resort back to their before death behavior.
The Deathcore Project was first used in the movie Puppet Master III: Toulon's Revenge and later in Puppet Master X: Axis Rising a similar project using a resurrection device is used. It is unknown if these two projects are related.