AD3VA GM's Guide (Version 3)

From the introduction:

Much of Neon Genesis Evangelion’s unique style comes from the show using Christian imagery and terms as a smokescreen to obscure details that are, on closer observation, the stuff of fairly standard science fiction. The actual terms and images used, while iconic (and intentionally so), are not in themselves as important as the role they fulfill. As such, GMs may find it worth their while to invest time while planning a campaign into molding the mythology it will use. This could involve making minor changes to the present mythos portrayed in Evangelion canon to better suit your own variation of the plot, or even using a whole new mythology entirely!