I'm running a game currently where the PCs have investigated the first active reclaimer movement where they were essentially shot through a hole in the PC fence that showed up for a few hours every few days. The drop pods allowed the building of a small camp, and from there the PCs were able to explore the surface. The drop zone was NE of Denver, CO. They found some Exurgent "barnacles" that were apparently cleaning the ever-present chaff in the air that gives the atmosphere it's rusty colour, as well as survivors. The first survivor was a young girl, apparently born during the fall, in extremely archaic clothes and weaponry (early 1900s, one character recognized it from Old Earth Media), but other survivors seemed more weathered. I based most of the survivors off of Metro 2033, which I have been faithfully playing in tandem. They live in the Denver subways, where the TITAN war machines had inexplicably avoided, by the skin of their teeth. The PCs managed to aid Station Atlas with food, water, medicine, and weapons, but an attack from Station Ares alerted TITANs through seismography (emergency explosives to close a shutter). The TITANs quickly assaulted both stations while the PCs were in transit to Ares Station, leading them to find that the first survivor they met was somehow involved with the TITANs, as when a PC got caught in the searchlight of a massive combat mech, the survivor (named Echo) managed to get it to stand down. There are three major TITANs in Denver, left behind for various reasons. One is Echo, she is a TITAN, but she is "flawed" in that she is a conservative. She believes that Humanity, and in turn the TITANs, rushed to the stars and in turn were punished by their haste. She is extremely backwards-thinking, turning her hyper-intelligence to studying history and society, "correcting" it. She wants to rebuild Earth to what it was far earlier than the Fall, and invite Humanity back to shepherd them. She is not hostile to the party, she is actually very helpful to them. God help me, one PC sleeved into a copy of her morph. I still need to stat that out. One other specializes in conventional warfare. It may not even be a TITAN as most think it, it just wants to destroy, build, and destroy. The last one experiments on humans to make Exurgents, as well as creating several new life-forms and artifacts. Does my iteration of Echo as a TITAN seem believable? I literally thought her up on the fly, as the session lasted 9 hours, and gradually revealed more things she built (remodeled arcologies, rooftop greenhouses, ect.) Her motivations are understandable from a human perspective, but she is not a TITAN, not an alien intelligent entity. Perhaps the Exurgent virus did infect her, and turned her view to the past rather than the future.