IV and VI for the older games, Tactics , X and XII for the more modern age.

Fun fact: FFI-III didn't have those logos originally, they were created for the remakes to make them fit with the rest of the series. Also IX's logo is the only one in the bunch not drawn by Yoshitaka Amano.

FFI


FFII
FFII-Japanese-Logo.png

FFIII
IIILogo_High_res.png