Ultimatum mod for Duke Nukem 3D

After episode 3 of Duke's adventures, scientists
recovered the eye of the Alien overlord, they put it in
a jar and it began to pulsate and grow, soon there was a
whole head growing and they had to move it to an incubation
chamber in their secret labs. Unfortunately as the rest of
the body grew they could not hold it any longer. They pulled
the cord and left it to die. Screams of Alien pain ripped
through Los Angeles and when the scientists returned the
Overlord had escaped and was rampaging through the streets.
Soon afterwards earth recieved the final of many communications
from the aliens, demanding their new born leader. It was an
ultimatum, if the overlord's coordinates were not given, a new
attack wave would be sent to earth more devastating than the
last and they would destroy cities until they found their leader.
Due to the loss of the overlord and a few vague sightings they
had to call on the EDF for assistance who brought in their best
agent, DUKE NUKEM, his mission was to clean up the alien attacks
and, if possible, find the overlord before the aliens take him
back to their home planet. You continue from an empty room in
the EDF headquarters where aliens have already begun to attack..