A FPS is a First Person Shootup... such as Quake or Doom.
A Fantasy Role Playing Game is abbreviated FRP or RPG or FRPG.
What font are you using, that shows S and G the same?
All of which?
FRPGs are far from simple... I can't imagine an AI playing an FRPG, sitting at a table moving pieces on a board, and with a sheet of stats
FPS, while not generally require huge amounts of brainpower (you could easily design an AI to do the shooting and dodging stuff needed), there is an element of puzzle solving ... finding keys or items, possibly doing things in a certain order, requires thought.
Of course, since game levels in many FPS aren't generated randomly, (nor do the monsters move randomly, usually), you don't even need an AI to defeat a level