Ok this is my take on 1920's gravity falls au with my own oc, Cynthia Scarlett Cipher, yeah I have a problem, I have not been able to get over this oc. Just a warning though this is probably going to have a lot of shooting and stuff in it. summary: It's world war one, the central powers are losing and decide to summon an evil spirit for help as a last ditch effort, Bill Cipher. Things are going great for the central powers but the rest of the world is in turmoil and ruin. After their parents are killed by a plague ravening the country, Dipper and Mabel Pines are sent to live with their only living relatives, Stanley and Stanford Pines in Gravity Falls, Oregon, the most corrupted town of the U.S. Dipper and Mabel are soon dragged into a world of gangs. (summary to long first chapter continues summary so please read the rest of the summary)