One of those questions that arise spontaneously in my mind. To me, the answer for a long time has been NO.
I mean, if there is an RPG that really satisfies you completely, putting you in the condition of not having to rely on other game's mechanics to incorporate in the first one.Is there a game which need not being ameliorated by adding pieces and rules taken from other (alien) sources?
As a mind experiment, let us ask if AD&D is perfect. Someone went so far as to affirm to feel a sense of the "numinous" whilst reading through its pages (my friend James, and i understand what you mean by that,and i feel exactly the same with other rpg's), but is this an exaggeration? Can we claim there is such a perfect game?