The Prison of Tunnels

A prison is a deadly place to be. Their are gangs, corrupt guards, riots, mad prisoners, and all sorts of nasty things inside. When prisons were becoming increasingly packed the government needed a new place to keep them and they needed a solution fast. "Fortunately" someone from Atlas had the bright idea of making a portal to another dimension to have all of these prisoners stay. Though this was no ordinary dimension it was nothing but a system of tunnels going for countless miles. During investigation it seemed these tunnels were made by someone or something and small "pocket towns" were found but no inhabitants were ever found and lots of wreckage. No corpse of any alien life was found but their were crystals that seemed to be used as lighting in the caves. Not to mention the strange vegetation that may have been farmed by the aliens. They even discovered that powers don't work here. Sadly before they could fully explore what was their the general needed to put the prisoners in their now. So they quickly made a secured front in the portal area and made what will be known as The Fissure. They had minimal necessities for the prisoners food garbage, bedding almost if not wore to hell, and medical? Forget it. After a few months nothing happened. Prisoners of all types were being brought over Stray Devils, Fallen angles, Rouge huntsman, Villains, etc. You get the idea. Hell even people considered powerless were thrown in to purify the races. All of them died nearly right away after entering the prison for obvious reasons. But after the third month the government thought they were spending too much for the prison so they pulled out everything. Including contact with the outside world, and finally made the portal one way so their was no possibility of escape. After that it was total anarchy. But after some time the "powerful" took over and created a alliance. They slowly explored the tunnels and secured the towns. But they were not ready for what was beyond the tunnels.