No one knows exactly what happened, little that it matters. We know the world died that day - almost.
Perhaps it was the Rapture, and we were all left behind. We are certainly in hell now.
Influences - Fallout, Gamma World, Bioshock, Cosmic Era (Scrasamax)
Game System - Pathfinder primarily, with adaptations for modernity and Fallout (and others) Content.
This will be a fairly open campaign, new players welcome. No fixed caps on # of players.