What follows is the result of a lot of discussions, years of gaming, and running campaigns. If I came up with a unique location, be it a city, faction, guild, or other such fictional group, you'll find details on that in the articles that follow.

Shaun Prescott was a charismatic man leading a small group of mercenaries. He has waged a personal war of vengeance ever since he was a teenager. Following the sadistic and brutal murder of his family at the hands of a particularly monstrous Breach Creature, Prescott became obsessed with pushing what he believed to be invading forces back to their own worlds. Barring that, he is content to send any Beach Creature he encounters to meet their gods. 

New Caldera Valley
Oasis & Immediate Vicinity
New Caldera Valley & Vicinity
Valley of the Coyote
Valley of the Coyote