Shin Megami Tensei takes place in Tokyo, Japan, and follows a blank slate protagonist and several of his BFFs as a bunch of crazy shit happens. The plot begins with Stephen Hawking creating a computer program that can summon demons, but then quickly spirals out of control as the demons begin to infest Japan and form two competing cults that are torn between following Lucifer and Yahweh. Naturally, this situation quickly devolves even more as Thor decides to do what America should have done 50 years ago and launches a fucking nuke directly into Tokyo in order to make God proud.
Despite featuring gameplay and a UI that were basically stolen from Wizardry, Shin Megami Tensei is actually the sequel to a series of Famicom RPGs called Megami Tensei, which were themselves loosely based on a series of books called Digital Devil Story by a Japfaggot named Aya Nishitani. The game can essentially be summed up as Pokemon for teenageSatanists.
You. You're a useless cunt who can't use magick, but you do have the ability to summon demons and store them in your faggot-ass Yu-Gi-Oh! bracelet.
Heroine
File:SMT1HeroinePortrait.png The obligatory woman character who learns a lot of magick. She dies halfway through the game but eventually gets better. She's essentially the game's neutral character and doesn't give a fuck who you're aligned with.
File:SMT1HawkingPortrait.png Literally Stephen Hawking. He created the aptly named Demon Summoning Program for your COMP which can be used to summon demons. As a result, he is directly responsible for all of the shit that happens in this complete abortion of a game.