Apocalypse Academy: Dark Origins

Mankind has led the Earth into ruin. Hubris and greed brought forth infernal deals to gain positions of power, and prestige. Reinforced by the acquisition of advanced sciences, humanity has attempted to wield the power of a god and instead caused suffering at catastrophic levels. Each time, man rebuilt, believing that they could correct their mistakes and make the world a better place and each time they failed causing the most tragic consequences imaginable. Nuclear energy, greenhouse emissions, global warming, weapons of mass destruction, and biological warfare all cost millions of lives, but nothing compared to the final disaster that brought the Apocalypse to the planet.
Supercomputers and untested science brought man to the next level of destruction. Scientists believed that they could replicate the birth of a black hole by accelerating particles in an enormous device known as a Hadron Super Collider. This multi-mile-long machine was going to unlock the secrets of creation and open the unlimited cosmos to humanity's whim. So quick was man's desire that they never once stopped to consider morality or the consequences of delving into the blackness of space.
The result was far from their wildest dreams...or nightmares. A tear in space and time was opened. It was not a black hole but a portal into the nether regions of the blackest hell. Demonic entities released an infernal necrotic virus to cull mankind's herd. Humanity fell by the millions in mere days only...they did not stay dead. Rising back to their feet, the infected corpses continued the abyssal quest to destroy any remnants of survivors. Loved ones, former friends, family, and co-workers were devoured. Humanity has regressed into pockets of scavenging survivors and gang-style bandits. Except for one group...

Descended from the bloodline of the original 300 Spartan warriors that fought at the Hot Gates of Thermopylae against the tyranny of the invading Persian armies, these men and women have been assembled at the Apocalypse Academy from the furthest corners of the world to save the last remnants of mankind from extinction and fight to reclaim the world from the unwavering evil horrors of the walking dead.