Old World. Stuff that was there before the End happened. Before the Demons... the Infected showed up.

[Wow. That sure... probably doesn't make any sense! Sorry Nico. He's still learning a lot about this himself and sometimes he just doesn't have the words to explain it.]

The Prophet said our reliance on those things, technology, is what caused humanity's downfall from the End. ...I don't like using that stuff.