Dark Assault (2000)
Over 30 years have passed since the Iron Savior was defeated, and humans and Calderans have finally united. Both worlds, Earth and Caldaris, have been living in brothership ever since. Within the "Federation of Atlantis", humans and Calderans have grown together more and more. But these golden decades were ended abruptly when space and time were ripped apart and a gateway opened its mouth between the dimensions like the Jaws of Hell. A violent and highly aggressive species emerged from the gate. This was the day when the Shadow came.
The Shadow came from another dimension, a different universe where after millions of years no other species existed any more. Since ancient times, they have moved from one world to another draining all resources and energy and leaving behind cold and lifeless matter, wasteland and exploited planets. And so the universe of the Shadow has become a universe of everlasting darkness where night has fallen for eternity. The Shadow were doomed to die, but they developed technology to travel into different dimensions and realities in order to search new hunting grounds. Thus they are expanding their Empire of Darkness more and more as they have done for millions of years. This gateway brought the Shadow into the hemisphere of man, into a virgin and unspoilt universe with all its resources to exploit. And so the black army of the Shadow intruded into our world, merciless and cruel like deadly predators on the hunt for prey. Desperately man tries to fight back and stop the Shadow, but it seems to be impossible...
Far away from all this, the Iron Savior is drifting alone in deep space. After the Iron Savior was defeated by man, the bio-unit desperately tried to regain control over the machine. But the artificial intelligence of the computer was still deranged and confused. The computer had gained a consciousness during the millennia out in space but somehow it was still tied to its basic programming from Ancient Atlantis. Due to the non-existance of the Atlantean continent, it had come to the fatal conclusion that Atlantis had been destroyed by the Alliance and that man was the Alliance. But finally the bio-unit is able to convince the machine that after 350,000 years the basic programming is not relevant any more and that humanity actually consists of the sons and daughters of the ancient creators. And now, both bio-unit and machine will have to protect and serve Atlantis. And so the Iron Savior is on its way to return to Earth.
Meanwhile, a devastating battle between man and Shadow is raging. Even though man fights in defiance of death, the Shadow race is thrusting forward more and more. Through the gate, the invasion troops get a neverending backup - for every destroyed Shadow vessel, ten new ones seem to emerge from the gate. If the gate was inoperative, the Shadow would be cut off from this backup... So a brave command dares to pass through the gate in order to destroy it from beyond. The men do not know what awaits them, but it is very unlikely that they will ever see Earth again. How can they return when the gate is destroyed? And the suicidal mission begins...
The Iron Savior opens fire to the Shadow vessels. Grimly and relentlessly, he carries out his orders and the tide of the battle seems to turn. The force of the ancient machine drives the Shadow back to the gate. Now the gate command must be successful in order to defeat and ban this dreadful and mortal danger to man and the entire universe...