snowkatt: i can only speak for myself but
ff 4 doesnt require any login to a square account
ff 7 does
ff 8 i cant recall but i wouldnt be surprised if it does
ff 13 doesnt
and EA threw their toys out of the steam pram around mass effect 3 since then their pc games are confined to origin
FFIII; FFIV + FFIV AY; FFV , FFVI , FFXIII, FFXIII-2 , FF TYPE-0 don't require any square account
FFXIII Lightning Returns, doesn' t require a Square account, BUT requires to have the steam cloud enable (it's hidden on the gamecard, you need to fully check the system requirements), otherwise doesn't run, They "fixed" the need to be always online to play the game.....(IE the offline mode didn't work) -> if you ask me i don't really understand this paranoia.
FFVII , FFVIII, require a square account -_-
i could mistaken ofc (but that what i'm aware).