@gamingonlinux it depends what do you want? deep story and lore? or just deep story? look, my suggestion is the deus ex: human revolution, and of course the best dragon age game, dragon age 2 (i know, but the story is so rich). after then, try the larian rpg's or the outer world, but the end of the day you feel empty, because no one can built unique universe just like the mass effect trilogy is.